PATIKIL 5.4mm Drill Bit, Jobber Straight Shank M35 Cobalt 5% High-Speed Steel 135° Gold Finish for Stainless Steel Hard Metal - 10 Pack

The drill bits arrived very promptly and appear to be very good quality. Very well sharpened and cut aluminium beautifully. Haven't tried harder material yet but will update when I do.

Not too bad - for the price. Maybe that's why you get 2? Did eventually go through 3mm stainless steel so OK for those jobs but anything bigger, spend the money. Quality is not too bad for the price.

They worked as they should.

Cuts easily through steel and aluminium.

Perfect for the job

Could not believe how sharp these are. Went through my block of steel pretty much like butter.

So weak even for soft metals. Waste of money

Did the job and didn't break

alles bestens

ステンレス板にNP取り付け用の穴を開ける為に購入しました。 2.2mmは細くて折れやすく、再研磨も難しいので、消耗品的に使える、安くてステンレスにも穴あけ出来るドリルを探してました。 これ結構良いです。低回転で少し強めに負荷をかけると、切れてくれます。 たまに負荷をかけすぎて、折ってしまいますが、コストが安いのであまり気になりません。中国製みたいですが、良い仕事してくれます。

I purchased this PATIKIL 5.4mm M35 cobalt drill bit for drilling stainless steel and tougher materials, and it performed very well. The bit arrived sharp and ready to use, and the 135° split point helps it start cleanly without wandering. It cuts smoothly with minimal effort and holds up much better than standard HSS bits. I’ve used it on steel brackets and hardware with consistent results and no noticeable dulling so far. The straight shank fits securely in my drill chuck, and the gold finish looks professional. For the price, this is a high-quality, reliable bit that’s perfect for tougher drilling jobs.

OK ! PARFAIT.

SUS304の10mm厚材の貫通穴に使用しておりますが、折損してしまいます。 新品ドリルでも、全て再研削して50～６０個が限界です。