CONFAST 1/4" x 1-1/4" Concrete Screws 410 Stainless Steel Hex with Concrete Drill Bit for Anchoring to Masonry, Block or Brick (50 per Box): Amazon.com: Industrial & Scientific
14 x 4" Hex Flange Concrete Screw 410 SS Bronze
Cobra Anchors 683T Concrete Screws Hex Head 1/4 Inch By 2-3/4 Inch With Drill Bit 100 Pack: Concrete Anchor Screws - Hex Head Over 1-1/2 Pounds (058060854965-1)
SAMMYS® Cracked Concrete Screws Sidewinder® Rod Mount
3/8" x 1-3/4" CONFAST® Hex Head Concrete Screw, 25/Box
high quality self drilling concrete screws| Alibaba.com
MasTek Self-Drilling Concrete Screws 1/4 x 3" Steel Tungsten Carbide Tip (15PK): Amazon.com: Industrial & Scientific