M35 5% Cobalt Metric Drill Bits Set (1mm-10mm/19pcs), Straight Shank Jobber Drill Bits, Metal HSS Twist Drill Bits for Stainless Steel Hard Metal and Cast Iron

Awesome drill bits!!! Works great for drilling through aluminum.

This set is a great value for your money . The storage case is very functional and markings are easy to read. The 5% cobalt content makes them very durable and are very sharp. I have drill metals and plastics so great drill ability. Great buy if you are into 3D2A projects.

I've used the bit for some plastic and aluminum projects and they seem good. However, the plastic flip case broke on the third or forth time opening/closing it and it felt quite flimsy right off the bat. Buy this for the bits, not the storage and you should be ok.

I went through 3 other bits to drill 5 holes in a steel utility trailer. Then ordered these drill bits. I drilled over 30 holes in same steel trailer frame using one ONE of these drill bits! Still remained sharp. Remember to use alittle oil when drilling. Seriously, these drill bits are great!!

Bits work great. Mostly used these to drill holes in plastic parts, which is relatively easy. They are definitely sharp out the box and left very clean holes. My only complaint is the box. Mine came with the black holder in pieces. Not sure how it got broken inside of the clear plastic box. I'm not interested in replacing when all it does is store it, just a slight annoyance.

very nice product

solid drill bits.

Sharp

I made my mounting rack for my solar panels out of used steal pipe, and I had to drill quite a few holes for mounting these panels. The piping was quite hard and I bought five drill bits, so as to make sure I wouldn't run out. To my surprise the drill bits held up really well and I was able to drill all the holes with just one bit. I did pre-drill the holes with a center drill, but that was all I used, and of course some lubricant. I never thought that I could drill these many holes without wearing out the drill bit. Quite amazing.

A hardened piece of steel that broke several conventional bits did not stop these drills. Amazing difference from normal drill bits. Use caution; they will snap if driven too hard / fast. Use lubricant and go slow...they work very well.

Wanted,to have these bits, last longer

Buen producto.

J'ai dû percer du métal avec ces forets et tout a fonctionné selon mes attentes. Les forets percaient dans le métal sans problèmes, c'est ce que je cherchais