628HP 7 Piece Titanium-Coated Rotary Drill Bit Set - Ideal for Wood and Soft Metals Drilling

Great little assortment for drilling small holes in wood and softer materials. The bits fit my rotary tool well and have stayed sharp for the kinds of hobby projects I do. Nice to have multiple sizes on hand without buying a huge kit.

Must have if you have a Dremel rotary tool. Great quality and seem to drill materials as expected.

I was initially concerned about using the Dreml for drilling through a piece of steel used as a weight on a model train. I wasn't sure the unit had enough torque to accomplish it, and that's why I sourced the OEM product, as it concerns me which tools I put in the Dreml, because of its very high rotational speed. I'm so glad I opted fore these: I drilled a 1/16" hole through a ⅛" thick plated steel weight in seconds. These drills behaved like I was putting a hole in something like wood or plastic. I used a little spring-loaded centering punch to mark the drill location and the drill never walked from that spot, meaning the drill point was very sharp and bit right into the steel without wandering. Dreml instructions say drilling in metal should be done at fairly high speed, and some coolant or lubricant should be used. I only had 3 in 1 oil available, but that worked perfectly. In the picture, you can see the screw and nut that are mounted in the hole; this is a #0-80 x 3/16" screw which is very, very small. The 1/16" hole is located 1/16" from the edge, meaning there is only a 1/32" "wall" from the edge of the weight to the hole. For me that is a precision hole location, and I was surprised I could hold that location that accurately, a testimony to the sharpness of the drills. I haven't tried after-market attachments in the Dreml because I am concerned about using attachments that are not truly designed or manufactured to tolerate speeds up to 30,000 RPM. An attachment failing at that speed could cause serious injury. So I stick to the OEM product and find them very reasonably priced for the quality. Of course, I always wear safety glasses when using the Dreml for that very reason. These drills, which are not all that expensive, significantly expand the capabilities of my Dreml tool and I heartily recommend them to anyone with a Dreml device.

The product appeared to be of fine quality, needed finer bits, so I returned it and went with something that fit my needs better.

Function as it should be. I only used these to drill a hole for my little pet name plate. It is a hardwood and I'm a newbie at this rotary tool but it drills really easily. And it works very good with my Dremel 8150. A variety of size and good durability. I think it's worth of money.

I needed a set of drill bits capable of drilling through thin brass sheet, and these worked perfectly.

Tiny for small things

These drill bits are handy for doing any project. I used them over the weekend and I was amazed that they were still in one piece after I was done. Very handy and probably one of the best bits I have ever purchased and used.