Concrete Drill Bit 5pcs 3/8" X 6"-4" Cross-Type Double Thread Carbide Material Suitable for Concrete, Brick, Cement Walls, Stone, Hammer Drill Bits for Concrete

Works great and good value

Great product and reasonable price.

This bit did its job well. It cut through concrete like it was barely there. I drilled 12 holes in 5 in thick concrete.

Looks solid but haven’t used it yet.good price

It really did a pretty good job. I was drilling and epoxy setting anchors into sonotubes footers for a Versatube tractor shed. Drilling with a 1/2” then 3/4” the full depth. 16 posts and they’re still usable! Brazing was a little ugly, but it worked. Dust removal wasn’t as good as the Milwaukee bit, but it also cost 1/3 as much

These carbide drill bits feature a cross-tip head designed to maintain alignment when starting holes in dense materials like concrete and brick. The double-thread fluting channels dust away from the tip during operation, which helps prevent the bit from binding at the full 8-inch depth.

The product description is accurate. I am very satisfied with this purchase. The price was reasonable and the item was delivered in good condition. I may consider purchasing this item again or at least recommend it to other people. Accurate product description !!!!! Good purchase and good price !!!!!

Seemed to have a problem drilling through ceramic tile. Only needed to drill on hole, so it satisfied my need. Though, it took a long time without cracking the tile. If another project comes along requiring me to drill through tile or concrete, I'll try it out again.

Awesome, drill into reinforced concrete like butter. Compare to Makita 4mm drill bit at 50mm(110mm total) in length, these 4"/100mm(150mm/6" total) drill faster with less resistance. Also, the CONFAST 3/16" concrete screw broke when screwing into the hole drilled by the Makita 4mm drill bit. Might be the Confast screw is lousy or the 4mm hole is too big? But 5/32" IS ‭3.96875‬, ‭ ‭0.03125‬mm smaller than 4mm, I don't think that would made any difference. I would say these drill bit created cleaner hole for the 3/16" screw to bite on. I was kind of disappointed with the first concrete screw I ever tried as it broke but these work wonderfully, Highly recommended!