

🌊 Dive sharp, stay secure — your ultimate underwater edge!
This 9" scuba diving fixed blade knife features a 4" corrosion-resistant stainless steel blade with partial serration for versatile cutting. Designed with a durable ABS handle and impact-resistant quick-release sheath with adjustable leg strap, it ensures secure, reliable use underwater. Lightweight and compact, it’s a top-ranked survival and diving tool favored by professionals and enthusiasts alike.






| ASIN | B01IDA0P8U |
| Age Range (Description) | Adult |
| Best Sellers Rank | #116,499 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #27 in Divers' Knives & Shears |
| Blade Edge | Compound Bevel |
| Blade Length | 4 Inches |
| Blade Material | Stainless Steel |
| Blade Shape | Straight (Non-standard) |
| Brand | MASTER USA |
| Brand Name | MASTER USA |
| Color | Black |
| Country of Origin | China |
| Customer Package Type | [Implied] Protected Package |
| Customer Reviews | 4.2 4.2 out of 5 stars (745) |
| Date First Available | July 13, 2016 |
| Hand Orientation | both |
| Handle Material | Acrylonitrile Butadiene Styrene (ABS), Rubber |
| Included Components | Knife |
| Item Length | 9 Inches |
| Item Package Dimensions L x W x H | 9.21 x 1.93 x 1.46 inches |
| Item Weight | 4.93 Ounces |
| Manufacturer | Master Cutlery LLC |
| Model Name | MD-1BSL |
| Orientation | both |
| Package Weight | 0.14 Kilograms |
| Part Number | MD-1BSL |
| Product Care Instructions | Hand Wash Only |
| Recommended Uses For Product | Camping, Hunting |
| Reusability | Reusable |
| Shape | straight |
| Special Feature | Adjustable |
| Style | Modern |
| Theme | Western |
| UPC | 719412081162 |
R**S
Great.
Sturdy and well made. Handy and convenient. Excellent all around knife.
K**.
Locking Sheath Works
The sheath is locking, so there is no chance of the knife sliding out. I didn’t want to risk carrying it in my bag in case it did end up sliding out, but it is very secure. The knife itself comes fairly sharp and so far hasn’t dulled much for me yet.
J**K
Now THAT‘S a knoif!
I’d like to start off by saying I had read the reviews prior to purchase and expected the smell and lack of serrated blade. So, I was almost a little bummed that it came serrated, but that’s alright, not a function I necessarily needed. The blade isn’t terribly sharp out of the ‚box‘. It cuts and „serrates“ perfectly fine. I did notice the odor some were talking about, akin to cigarette smoke, but it just seemed like the rubber straps were kinda a weird quality. I assume they’re meant for friction instead of just hanging onto your body. I wear this around my calf rather than my thigh, excuse the free feet pics. I’ve got thick calves. It stays in place and fits relatively well, I can just barely notice it. The only complaint I do have is that the Holster pretty much requires two hands to remove the knife. One to push the button and leverage enough to keep it held down while pulling it out. I may just 3D print a spring loading mechanism with a lock instead. It’s a great little knife whether you’re using it for Self Defence, knife throwing (pretty great balance) or cutting through netting or rope. Considering other reviews, you may have to look elsewhere or better acknowledge that it will rust in salt water. The only thing I can suggest is making sure it’s rinsed and completely dry prior to putting it away.
K**A
Great knives. Great holsters. TOO SHORT STRAPS.
I like these. I wear them around my waist when I’m walking around at night for safety reasons. The knives are good. They’re very sharp. The holsters are also great. The knives will not come out unless you want them to. The only downside is the straps which you do have to put on yourself. The straps were not long enough for me and I’m not a large person. The straps couldn’t fit around my thighs. What I ended up doing was connecting the straps on each knife together and wearing one around my waist and one around my butt. That worked but one of straps got stripped a little later on. Also, because I can’t tighten the straps too much because they’re so short, sometimes the little connect piece falls off. That being said, these are seriously great knives and holsters but I recommend getting yourself some longer straps separately. I don’t know whose legs these would fit around besides a child.
G**Z
Really good product
I use this on my upper thigh and it actually fits and clasps well being tight it staying in place while walking good for under a dress very strudy and durable material definatly a good purchase i feel alot safer with it very convient lock for knife easy to grab but secure to not get easily pulled out by child or dropped
J**Y
Sharp and Agile
Great quality for the price, holster is easy to attach with a safety button. Nice knife overall
A**A
I feel safe now
I love everything about it. My friend is sharpening it for me. I got it for extra security since I am a transwoman who liveds on her own, be safe ladies. This knife is light weigh, and the sheath is incredible. Both sexy and deadly. Conceals under a skirt or dress easily
S**N
This is the one you want.
Being a firm believer that you get what you pay for, I wasn't expecting much from this knife so I ordered 3 different ones. This one, another one for a similar price that came with 2 sheaths, and a $25 knife. This one is the winner. The knife in the other similarly priced option is slightly better but the sheath is cheaper and broke after 1 day. The $25 option was just terrible and clumsy. This is the one you want.
Trustpilot
3 days ago
2 days ago