HC2001B25 25 pc. 5/32 in. x 6 in. SDS-Plus® Bulldog™ Rotary Hammer Bits

I bought this to use with rock wedges. I read some negative things that implied this bit isn’t up to the task.It is.Don’t push on it. Let the actual hammer drill do its job. Keep it cool. Use a small bottle and stop every few seconds to fill the hole with water. On old cement I used it on the standard hammer drill setting. I am using a Bosch SDS plus drill. It goes through like butter. Until it hits a rock, of course.This morning I drilled two holes into modern 3600 psi concrete. My driveway. That did slow it down. So I broke out a pointed chisel bit and set it to Hammer plus drill. Once that hole was well started using lots of water, I kept the same setting and switched to this drill bit, and that bit just went to town.With any tool taking this kind of abuse, you must treat it with some respect. Keep it cool. Don’t force it. Let the drill machine do the work.Mine is still going strong with several hours of use on it.

I'm going to return the bit. I was shipped by amazon just wrapped in bubble wrap and was completely arched/bowed rendering it unusable and destroyed. I have purchased the same bit before in a larger size which they are awesome workhorses, I needed this smaller size to make punching through a 36inch masonry and adobe wall. Well now I have to wait again. The bubble wrap shipping amazon chose is totally unacceptable. They took away the shipping box review so I'm leaving my negative feedback here. Update: replacement bit came in today, this time it was shipped in a cardboard box fully protected. Bit was straight and ready to put in work! These masonry bits are fantastic. I'm changing my rating from 1 for the arched bubble wrapped bit to a 5 for the replacement properly shipped. Again my negative feedback was directed towards the shipping the bit themselves are superb.

There are indentions in the shank. It is designed for an industrial hammer drill. It will not Chuck properly in one of the cheaper hammer drills that has a drill Chuck. It will wobble severely. I cut some of the shank off and put some small flats on it with a grinder. The bit drilled four holes in concrete with no problem.

I had to drill a one inch hole into a rock ledge and this bit did the job with no problem and showed little wear after drilling two eight inch deep holes

We are building on to our house and we couldn't find this bit in any store.

Drilled into concrete for base post, pretty easy to drill but you do need to apply more pressure. The drill bit didn't look damaged after 8 holes which surprised me as i thought i would need to replace the bit soon.

Haven't used yet but should be ok for what I'm doing, beats local prices for the same thing.

Used to drill into rock to hold steps into place. Used a Dewalt cordless... worked fine.

What I expected. Did the job I needed it for.

Perforó fácilmente mi pared de block.

A no brainer, Bosch quality concrete bits. A 5 pack for the price of one bit.

Love it

Entrega rápida, excelente producto, sin problemas para instalar tuberías sin tener que rasurar la pared