Alpen72001040100 M 5 HSS Countersink, Grey, 10.4 mm

Having recently purchased a box set of countersinks from another manufacturer that turned out to be a very poor choice. Although, admittedly cheap, they were tantamount to useless. I will not be reviewing them.This countersink on the other hand, is sharp, well finished and cuts so beautifully clean, it's a shame to hide the effect with a screw.

Excellent sharp well finished and durable.. Worth the pennies

Im not totally sure about this yet, it was quite expensive but the quality seems good. Ive used it a couple of times in ash but im having a bit of tear out in the wood. I might need a bit more practice. Ill update the review once ive used it a bit more.

Don't use near grass.

By far the most expensive countersink I've ever bought, but also the only one to cut cleanly and show no sign of wear/damage after couuntersinking nearly 40 holes in mild steel. Coincidence? I doubt it somehow.I cut for only 2 or 3 seconds at a time to avoid overheating, using a drop or two of oil on each burst, a low speed, and reasonably firm pressure with a hand power drill. I'm sure it would be even better in a pillar drill.

I spent a long time looking at countersink bits and decided to opt for this slightly more expensive option (but it hardly breaks the bank!) as quality reigns supreme. In the long run it will save me money due to its longevity. I've yet to use it but it seems like a quality bit, and judging from other reviews here it seems to do the job very well.

Expensive, but it cuts through mild steel easily.

As others mentioned this is good. There's a lot of junk being passed off as worthwhile tools on Amazon. This is a real tool, it works well. I have so far only countersunk maybe 20 holes in mild steel but the performance has not changed at all. I will update if it blunts, if no update then it's highly recommended!