Ansen Tools AN-113 Diamond Tip Phillips/Flat Head Concrete Screw Anchor 3/16" x 1 1/4". 100 Piece With Drill Bit

Warning! Before drilling the first hole with included drill bit, make sure you check the size of bit included with your screws. The drill bit included with my screws was too large, requiring me to shut down my job, head to local hardware store to buy the next larger screws to fill the now larger than needed holes. Although I could not use any of the screws since drilled holes were too big, they seem to be well made. Too bad I had to discover this lack of QC at the top of a 12 ft. extension ladder.Helpful hint: The moment you get your screws with drill bit, lay the bit directly next to one of the screws. If the head of drill bit and thread part of screws appear to be same size, you have the wrong drill bit. The hole drilled must be slightly smaller than the screw threads. Otherwise, there is no way for the screw to cut threads into material for holding.Review updated: Contacted Amazon and they promptly sent replacement order, this time with correct size drill bit. I have updated my review from one to 4 stars, given the quick response by Amazon and corrected drill bit size. I held back a star since the QC of first order was lacking. The screws themselves appear to be good, strong quality. Also can not say how well the included drill bit would hold up since I only used it on about 8 holes in brick. It was satisfactory for the few holes I drilled with it. However, I went ahead and invested in some Bosch drill bits since I drill in masonry often.Very small difference between the correct drill bit on the left and the wrong drill bit on the right which was included with first order. The correct size bit for this screw is a 5/32".

The drill bit wore out after 2 holes drilled into stucco. And, the drill bit was sligltly larger than 3/16th. Fortunately I had another 3/16 masonry drill bit from a major manufacturer that worked fine.Or, the screws are a bit small for 3/16th and did not seat well in the drilled hole. (No, I did nothing other than drill a straight hole without side-to-side movement.)

The drill bit snapped in two while I was drilling the first hole into a concrete building! I couldn't believe it when it broke! I ended up using another bit that I previously owned and it drilled through the concrete at twice the speed. I was using an hammer drill and the bit being sold was supposed to handle the power of the drill; nope. The screws work great, but I suggest skipping the drill bit.

Did not work for my job full refund give.Really wish this worked. End up using a ramset.They seemed to be high quality.But they just would not grip the predrilled holes made with supplied bit in concrete subfloor.

The screws worked well in our stucco wall.NOTE: The included drill bit is too large, resulting in loose screws. Use a drill bit one size smaller.

Just as good as TapCon, good deep threads, Phillips head cutouts true and crisp, good coating, no runs or blobs.

I used these to drill into concrete block and some brick and they worked fantastic (using an impact drill of course). I would definitely recommend this product and seller!

I trusted these to hold up my guitars/bass hanging from hooks mounted on cinderblock and they seem to be working just fine. They drilled in with no problem.Get a good drill bit though.