Wensilon 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

Very happy with product, they fit well, the performed very well and was priced well also, would buy again

Excellent quality. Went through a concrete slab like butter.

These work great I installed 11 cluster mailboxes four holes in each one absolutely no issues I only used one bit the other three years still in my toolbox.

worked very well, wasn't expecting to be as durable, but still on the first bit after 15 4" holes (5/32) thought breakage would happen, these worked

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

I only needed to drill one hole through a 8 inch thick wall. This did the job pretty easily though toward the end it seemed to be getting harder. I think the life is about one hole. But that's all I needed so I am happy.

If I could give it zero stars I would. Once again the old adage holds true “you get what you pay for”. Not one of these drills so much as went beyond putting a dent in the concrete. Don’t be fooled by their appearance, they’re garbage. If you were playing “is it cake” and they gave you one of these drill and cake that looked like a concrete pad, I guarantee it wouldn’t penetrate the sugary goodness of the top layer of confectionary perfection.

Absolutely perfect, and a great price

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!