50pcs PCB Drill Bits Set Spiral Flute Carbide 0.3mm-1.2mm for Print Circuit Board Stone Dremel Jewelry CNC Engraving (5PCS Each)

Excellent for scale models!! These micro drill bits will work in any adjustable chuck hand drill. As some of the bits are oh so easy to break, at this price point it’s worth having extras on hand.

My immediate reaction was the drill bits looked well made and the individual boxes will provide good protection for the drill bits.I wasn't thrilled that the bits are not marked with the size. It was not difficult to make labels to affix to each bit and I have already done so. Doing it took some time but at least I won't have to measure a bit every time I want to use them. I used a digital micrometer to measure each bit.As far as their performance goes they work great. They are very sharp and I have already used them on three types of wood and bamboo, as well as plastic. The bits cut through everything with ease. I even had to drill some holes on sloped surfaces and if you start slowly the bits will not deflect. I think because they are tungsten carbide they are quite stiff and that helps on angled surfaces. However, I am sure most users know that since they are stiff and being quite small diameters you will have best results if used with a drill press. Drilling by hand can be done but the risks of breaking bits is greaterOverall I am very pleased and hopefully the bits will stay sharp over time.

Great value with substantial flute length given the diameter of each drill.

It goes without saying, that when utilizing drill bits this small, they're very easy to break if you're not really, really cautious.Having a small, jewelers style drill press is quite beneficial and will save you a lot of time and frustration. The fact you receive such a large quantity is a real blessing and I'm very pleased with these bits.Yes, I would recommend them.

I am not easily impressed and never thought I'd be excited over micro drill bits, but these are phenomenal. I just returned 2 sets of micro drill that were not as advertised where they just threw in a bunch of a couple sizes yet were sold as a complete set. These are truly a set. I needed to drill a lot of holes under .020 in some N Scale track. My old set was missing the smallest sizes so I needed new. I started with the 3rd smallest in this set (.0185 in) and chucked it in my old floor model drill press. I drilled through 1/8 plywood first before testing it on a section of track. Both came out great. I then moved down to the 2nd smallest (.0150 in) and drilled another section of track. No glitches, no broken bits, just perfect holes as needed. I feel confident I can now complete the task once the temp in my workshop gets above freezing.

These bits are very fragile, I guess that's why they give you a lot of them. I broke 1 bit drilling into a plastic miniature and another bit drilling into a pewter miniature. Its almost impossible to get the bit back out.The main reason I took off 2 stars is the bits appeared to be used already. Some of the plastic cases are more beat up than others. One of them was very brown and dirty. Several of the bits had remnants of plastic or some material on them.Despite them being used they still get the job done, but I suspect many of these have been previously used.

Geniales para los trabajos de electrónica de mi hijo

I used these bits for wooden model making. I found that they work well on various wood pieces. They will break if not careful. I broke one bit due to my carelessness. I only gave it a 4 because they don't label the sizes. I would buy again.