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

Great deal

Great for wood model work! I mostly use these by hand and twist with my fingers. They are as sharp as it gets, so let the turns of the drill do the work. They will break here and there, so I like the 50 bits offered here. Well worth the money, would recommend.

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.

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.

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.

Good little bits, but you need to understand the sizes.

They look like nice bits they seem to work well, I have broken 2 of them but I think that is more due to my lack of knowledge in how to operate my cnc machine. I m trying to etch a circuit board for an automation system I built, but what I did was prove that I am not even smart enough to open a box of cnc bits without injuring myself. I tried to open one of the boxes and it was stuck kind of hard, so I forced it open and buried the .4 and .5 bits into my finger, all the way in. I wish I had the cognitive reasoning of a sane person that didn't have two long needles stuck in their fingers and had taken a picture, because it looked like uncle martins antenna from my favorite Martian sticking out of my finger. To make matters worse I kept hearing this high pitched squeal and immediately though ,oh no, I must have accidentally turned on the machine. So instead of pulling out those 2 tiny daggers that thankfully my distal phalange (top finger bone) had to forethought to stop for me, I started looking at the machine to make sure it was off. The noise as it was, happened to be my daughter (20) squealing like a nutter because I was standing there with bits of tools sticking out of my person at odd angles. Worst of all it was my middle finger, the hardest working finger in the universe. I've been married for 23 years, its how we say good morning, its how we pass each other in the hallway so we can at least say we had hallway sex, its how I let my kids my dog and my boss know that they are number one in my life. They were stuck in so good that they even came out of the box still in my finger. So they are sharp, and be careful opening the little boxes.

Handy container, decent sharpness for wood model. good range od sizes for ship model construction