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.

These bits fit perfectly into my Dremel 3100 and worked well right out of the package. They’re ideal for drilling very small diameter holes, just as described. I also appreciate that the set includes multiple pieces of each size. When you’re working with bits this small, it’s easy to chip or break one while you’re learning or if you’re not extremely careful. Having spares on hand is definitely a nice touch and makes the set more practical. Overall, they do exactly what I needed them to do.

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.

I used these on my micro drill press. They performed as they should. I added a little extra speed to the and they held up well. I am very pleased. I drill into brass, plated silver and sever other metals and these bits perform very good.

Easy to use and worked awesome

You get 5 packs that surely seem identical. Broke 4 removing PLA supports, so not even making a hole in solid plastic. On solid plastic, you wont get the drill very deep before it breaks. Wouldn't buy again, even though they're micro drill bits, I expected some to break but 4 in a row with very little pressure seems excessive.

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 greater Overall 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.

５ケース入りだったので購入。当たり前だが，細いドリルは作業中に余計な方向から力が加わったり，落としたりするとすぐに折れる。使ってすぐに折れた。慣れてくるとそれほどでもないが，慎重さは必要。特に０．４ｍｍ以下は折れに注意。それ以上の大きさはずっと使えそうな感じがする。５セットもあるので。

They do the job but as to be expected, the small (er) ones are super easy to break so yeah, the 5 pack is gonna come in REAL handy. It's not the tools fault it's the tool running the tool, I didn't have my drill bit square to the piece i was drilling a couple of times and they break easy. If you're using them square to you work piece and dont change the bits angle once you're in and allow the bit to pull itself through you will be amazing at what they can do

These arrived promptly. They appear to be good quality. Due to some feedback from similar listings for drill bits of this type I was keen to try them - especially the smaller bits. I mounted the smallest bit (0.3mm) into my micro-drill press and drilled multiple holes in 1mm ABS, 4mm soft timber and 1mm brass sheet. Whamo - all good. No breakages. I tried two speeds. 50% (approx. 2000rpm) and 100% (approx. 4000rpm) All good. As mentioned umpteen times before on these sorts of listings, you need to go EASY with these types of bits - or any small bits like these. Any excessive run-out on your drill press or excessive force WILL snap the bit. Drop the quill a tiny bit at a time, back off a tad and drop it again. Repeat till the bit pops through. Even in a pin-vice any slight twist or bending will likely snap anything under say 0.5mm. So go easy, give these bits the due attention they require and they will last you. Lastly, if you use small bits often - it's really a good idea to invest in a micro drill press (if you have a good look around you don't need to pay a lot of money for one 😉). 😎 Edited 22/06/2025 - corrected drill speeds.

腕時計の金属ベルトを加工する為に購入しました。 穴径を多きする為に使いましたが、案の定１本目は途中で折ってしまいました。 こんな時も５セット有るので、安心して作業を終えることが出来ました。 今回は一番太いドリルを使いましたので、他のサイズは分かりませんが良い商品です。

Excellent quality, I would not use the smallest drills in a hand twist drill though, too fine to trust, they will break. Only to be expected at that size. They are best used in a Dremel type drill that is powered. Not too fast a speed and care must be taken as with any drilling job with fine drill bits.