--- product_id: 346396653 title: "Benchmark Abrasives 4.5\" x 7/8\" Premium High Density Jumbo Zirconia Type 29 Flap Disc 40 Grit - 10 Pack" brand: "benchmark abrasives" price: "180 kr" currency: DKK in_stock: false reviews_count: 5 url: https://www.desertcart.dk/products/346396653-benchmark-abrasives-4-5-x-7-8-premium-high-density store_origin: DK region: Denmark --- # 40 grit premium zirconia for aggressive stock removal 4.5" diameter for versatile grinding Type 29 angled face for 90% abrasive contact Benchmark Abrasives 4.5" x 7/8" Premium High Density Jumbo Zirconia Type 29 Flap Disc 40 Grit - 10 Pack **Brand:** benchmark abrasives **Price:** 180 kr **Availability:** ❌ Out of Stock ## Summary > ⚡ Grind smarter, not harder — unleash pro-level precision every time! ## Quick Answers - **What is this?** Benchmark Abrasives 4.5" x 7/8" Premium High Density Jumbo Zirconia Type 29 Flap Disc 40 Grit - 10 Pack by benchmark abrasives - **How much does it cost?** 180 kr with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/346396653-benchmark-abrasives-4-5-x-7-8-premium-high-density) ## Best For - benchmark abrasives enthusiasts ## Why This Product - Trusted benchmark abrasives brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **ANSI Safety Certified:** Manufactured to meet strict ANSI safety standards for peace of mind on every job. - • **Built for the Metal Pro:** Premium zirconia alumina grains deliver superior durability and performance on stainless steel and non-ferrous metals. - • **Vibration-Reducing Backing:** High-quality backing plate absorbs vibration, ensuring smoother operation and less fatigue. - • **Maximize Your Grind Efficiency:** High-density jumbo flap disc offers 30-60% more grinding surface for faster material removal. - • **Trusted by Welders & Fabricators:** The #1 choice for weld blending, slag removal, deburring, and surface conditioning. ## Overview Benchmark Abrasives 4.5" x 7/8" Premium High Density Jumbo Zirconia Type 29 Flap Disc (40 Grit) is engineered for heavy stock removal and weld blending. Featuring a Type 29 angled face for maximum abrasive contact and premium zirconia alumina grains, this 10-pack delivers long-lasting durability and superior grinding performance on stainless steel and metal surfaces. Designed with a vibration-absorbing backing and ANSI safety compliance, it’s the go-to choice for professional welders and metal fabricators using angle grinders. ## Description Flap discs are used in heavy stock removal, often weld removal. They outperform Resin Fiber Discs due to their increased lifetime and last twice as long as Aluminum Oxide discs. To achieve a finish equivalent to a Resin Fiber Disc, always use a flap disc one grit coarser. e.g. If the operator is running a 60 grit Resin Fiber Disc, try a 40 grit flap disc. This 40 grit flap disc is made with Zirconia Alumina grain, which is ideal for stainless steel and metal applications while still working well with non-ferrous applications. The Type 29 angled face allows for 90% of the abrasive material to be in contact with work surface, yielding maximal grinding surface area for greater ease, effectiveness and speed. We use a high quality backing plate to help absorb vibration. Specific suited applications include: weld blending, removing weld slag, deburring, edge blending, surface conditioning and general metal fabrication. 'Jumbo' or 'High Density' flap discs usually contain 30-60% more surface area for grinding. ## Features - Benchmark Abrasives uses only the highest quality grains and backing material for our flap discs. - Designed for grinding, blending, sanding and finishing on a wide range of material. - The #1 choice for welders and metal fabricators. - Made in accordance with ANSI safety requirements. - For use on an Angle Grinder ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B01D0HA3LK | | Date First Available | 6 April 2016 | | Is Discontinued By Manufacturer | No | | Manufacturer | Benchmark Abrasives | | Manufacturer Reference | BM-F4.5SZ40T29HD | | Product Dimensions | 11.43 x 11.43 x 1.27 cm; 113.4 g | ## Product Details - **Brand:** Benchmark Abrasives - **Compatible devices:** Angle Grinder - **Grit material:** Zirconia - **Grit type:** Coarse - **Product dimensions:** 11.4L x 2.2W centimeters ## Images ![Benchmark Abrasives 4.5" x 7/8" Premium High Density Jumbo Zirconia Type 29 Flap Disc 40 Grit - 10 Pack - Image 1](https://m.media-amazon.com/images/I/71LKMXpx7gL.jpg) ![Benchmark Abrasives 4.5" x 7/8" Premium High Density Jumbo Zirconia Type 29 Flap Disc 40 Grit - 10 Pack - Image 2](https://m.media-amazon.com/images/I/81xUY4X0PhL.jpg) ![Benchmark Abrasives 4.5" x 7/8" Premium High Density Jumbo Zirconia Type 29 Flap Disc 40 Grit - 10 Pack - Image 3](https://m.media-amazon.com/images/I/61XyKVyc1TL.jpg) ![Benchmark Abrasives 4.5" x 7/8" Premium High Density Jumbo Zirconia Type 29 Flap Disc 40 Grit - 10 Pack - Image 4](https://m.media-amazon.com/images/I/717X5lmuZeL.jpg) ![Benchmark Abrasives 4.5" x 7/8" Premium High Density Jumbo Zirconia Type 29 Flap Disc 40 Grit - 10 Pack - Image 5](https://m.media-amazon.com/images/I/61aWSLjg2YL.jpg) ## Questions & Answers **Q: would these work to remove paint off a concrete floor?** A: Yes, but if you have a large area to do the discs will get gunked up with paint. Might want to use paint remover and a metal scraper. **Q: Are these good for wood?** A: They are actually VERY good on wood. Much faster than most sanders. You have to have a steady hand though. **Q: can this be used for sanding a jon boat?** A: I wouldn't recommend this for sanding a Jon boat as too much pressure with a grinder could penetrate the skin of the boat. **Q: what grit on these discs would be best to remove light rust and smooth paint on body of a 10 wheel dump truck** A: I would think 80 grit would do best for the light work you’re describing. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works in my home metal shop *by on Reviewed in the United States 10 September 2026* I have a metal shop in my garage where I make a variety of metal art, and I am constantly using flap disc. These are not the least expensive disc out there because of their thickness and density. They are well-made and they do last longer than the very cheap and thin disc that are out there. I use them frequently and they work well. Given the nature of what they are I do not expect them to last for a terribly long time, but it is what it is and they do a good job. ### ⭐⭐⭐⭐⭐ Great Disc for value *by on Reviewed in the United States 16 September 2026* Great disc , last decent , grind off material really well ### ⭐⭐⭐⭐⭐ Great for sanding paint from old tongue and groove floor *by on Reviewed in the United States 26 December 2020* I recently ripped out carpet from a very old tongue and groove floor — a floor that had two decades-old layers of paint. The paint was not peeling, the tongue and groove installation was not level, and for various reasons a floor sander was not a viable option.After trying 40 grit paper with both a belt sander and a random orbital, I resorted to these flap discs on an angle grinder. The difference was stark. I am getting much better results from the discs (it's not even close) and working much faster (again, it's not even close).There are however a few caveats.First, sanding wood with these is MESSY. While the sanders have a modicum of dust collection, the angle grinder does not, and these discs spit up a LOT of sawdust. At least twenty times messier than using a sander is my estimate.Second, compared to an orbital sander or even a belt sander, sanding a large surface with an angle grinder is really hard work and requires a fair amount of hand and wrist strength.Third, an angle grinder, even with a sanding disc as opposed to a cutting wheel, is a much more dangerous tool than a sander, and sanding is really only a viable option if you remove the safety guard. So you have to use good sense and have decent skills if you want to undertake this. You'll also want to protect your eyes.Fourth, sanding your floor this way can gouge it up pretty bad very quickly, especially if you're trying to remove paint from deeper pockets, which requires more angle. If you don't want a distressed look, or if you're unwilling to spend the time to sand out gouges, this is probably the wrong tool for you.But in my case, these drawbacks were well outweighed by the benefits. I am looking to dye the floor, not paint it, and I really wanted to get the paint off, including near the edges of the grooves and other spots where my belt sander and random orbital sander really struggled to get to bare wood (and only with a lot of time investment). And given the circumstances with this floor, which is patched and was not cleanly installed to begin with, I'm perfectly happy with a little bit of a distressed look.One more advantage: if you have nails or screws you can't get out or further in (or that you just plain missed), they will rip your sandpaper to shreds. With these discs, you can easily just grind them down. (Be aware though that grinding creates a lot of sparks.)How are the discs holding up? I had about 400 square feet to sand, and I estimate I'm close to 3/4 done. I probably could have swapped more frequently; nor have I attempted any method to clean out the discs of gunk (other than banging the disc on the floor a couple times), and I just put the third disc on prior to quitting for the day. If these discs were $8 or $10 each, I'd probably be dissatisfied with that, but given the price of this pack, I'm really happy with that sort of cost–longevity ratio. In my opinion, these are giving really good value.As I indicated, not everyone will want to use these on their floors. But in the right circumstances, this is a great option. ## Frequently Bought Together - Benchmark Abrasives 4.5" x 7/8" Premium High Density Jumbo Zirconia Type 29 Flap Discs 4 1/2 for Angle Grinder, Sanding Discs, Finishing - Grinding Wheels 4 1/2 Inch (10 Pack) - 40 Grit - Benchmark Abrasives Grinder Cut Off Wheels 4 1/2 Inch Aluminum Oxide Thin Type 1 Angle Grinder Cutting Disc for Metal, Stainless Steel - with 7/8" Arbor Hole, Fast Grinder Cutting Wheel - 50 Count - Benchmark Abrasives 6 Inch Aluminum Oxide Thin Type 1 Grinder Cut Off Wheels for Metal and Stainless Steel .045" Thick 7/8" Arbor, Angle Grinder Cutting Disc, Grinding Cutting Wheel - 25 Count --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.dk/products/346396653-benchmark-abrasives-4-5-x-7-8-premium-high-density](https://www.desertcart.dk/products/346396653-benchmark-abrasives-4-5-x-7-8-premium-high-density) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-10-30*