Bobibbi 3/16 x 1-1/4 Inch Hex Head Concrete Screw Anchor for Masonry, Block or Brick Anchor (100Pcs)

Excellent

Good price and worked well. I've used about half in cmu and had no issues. I did already have a tapcon bit but I'm sure the included one would work well.

The anchoring concrete screws were one or two sizes smaller from the proper size of the concrete bit recommended by the merchant, The holes drill on the concrete block became too large for the screws to fit. Therefore, I have no idea how well they work.

So for the money and number of screws they’re a good deal, especially over Tapcon prices. They’re solid, however the quality control could be better. I had like 3-4 that had blunted tips on them, so I couldn’t use them.

Not sure who's fault this would be but when they came I could tell they had been used. The bit was worn and you could see that a couple screws had been used because of the dust on them. However I had my own bit and the screws worked great. Makes you feel a little unimportant when you buy a new product and it comes to you used.