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

Perfect - high quality - as described

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

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

Nice set of drill bits for my dremel.

These fit my dremel perfectly.

Tiny for small things

I use the larger bits often to drill random holes in plastic, aluminum and wood projects. The smaller ones I use with a Dremel drill press to avoid side pressure and I haven’t broken any yet.

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.

Brocas eficientes para taladro Darmel. Buena duración

Good little set of bits, so far so good.

Good quality bits and strong, even the tiniest bit. Tested on wood, plastic sheets, and thin aluminum sheets, I had no issues. Recommended

Excelente producto, 100% recomendable