1 Count Silver Drill Bit Set - 13mm to 25mm, 6" Length, 2 Flute, Center Point, High Speed Steel, Wood, Metal, Plastic

These drill bits were exactly what I needed. Good price and delivery was right on. Thanks Amazon

Does the job, for occasional use in my shop, great job on aluminum, struggles a bit in steel500 x better than spade bits on wood, just be sure to tape both sides to reduce tear out

Very durable

Box arrived with a damaged hole in the back. So what? I tried out the 16 mm bit to enlarge a 15 mm hole and it cut fairly in 1/2 in mild steel. But the 16 mm bit measured in at only 15.4 mm and it was over a cm longer than the other bits. The 18 mm bit was then used to enlarge the hole. It cut poorly to about 1/4 inch then dulled and had to be forced through the rest of the steel. Much cutting oil was used on both bits. Very disappointed and returned bits.

I built a subframe for my Kubota from 1/2 inch 36 steel. I used the 18 mm bit 8 times and the 22 mm twice in my drill press. I used a lot of 30 weight oil. Close to a quart. For the price of the set, it would cost that to have one hole drilled at the local machine shop according to experience by my neighbor. Bore slowly and dont get impatient and use alot of oil. It takes around 30 or more minutes per hole.For my need of being exact I didnt use a pilot bit. The bits are still cutting.

These are cheap, poorly finished, and not all the correct sizes - a couple are out by 0.3 mm. One is too larges, and the second is too small. So on average, the right size 8-(.

This product is good for the value and they seemed to hold up I put them in my leave and needed 2 of the sizes that were available I will tell you that at high speeds larger drill bits will not cut you'll actually start cutting into the drill bit once you drill at at least 900 RPM and lower .

Great Product