IRWIN10502853 4 - 22mm Step Drill Bit (10 Holes)

Having purchased one of the chinese "titanium coated" offerings, which arrived half worn out, and was promptly returned for refund, decided to spend a bit more and ordered the original step bit. When it arrived I was not immediately wowed by its appearance. Tried it on some hardwood - very good neat hole, suitable for some limited counterboring. Fast forward 3 weeks and I needed a some 10mm stainless washers. Only ones I had were 8mm, tried drilling one out with hss cobalt twist bit, hopeless. Suddenly remembered this step bit, and 5 mins later half a dozen 10mm washers completed. Checked the step bit, and can see no wear or damage at all. I know it won't last forever but highly recommended.

Absolutely brilliant. I test fired it on the galvanised steel sheeting of my wheel-barrow before making a hole in the aluminium dashboard of my Caterham 7. I was worried about how controllable it would be but it can't go wrong without some serious input from the user. Check the diameter of hole required and make a note of which step is required, that's about it. The hardened tip makes a pilot hole unnecessary but it won't hurt to drill one. An excellent bit of kit, well worth the money.

Great for the price nice and sharp so far so good, probably used it about a dozen times even on a thick metal gate post and it cuts no problem.

Well priced and very good for what I need. Each step goes up in increments of 1mm which is very handy as I bought this for drilling guitar fx enclosure pedals and has made the job infinitely simpler. Not used it a huge amount yet so can't comment on longevity but it was a very good price compared to some of the other bits I found

My go to step drill every time need 1 , nice sharp , accurate & lasting long time ( if u use it right ) . Kev Harris

I knew the brand Irwin for the replaceable stanley-knife blades, the blue ones, those are very good so I bought this with high hopes.Was quite pleased to see that this stepped bit does work indeed. Even with 0.2mm titanium they would enlarge a hole without jarring. Of course, cutting oil is always recommended while drilling stainless, hardened steel, aircraft grade alloys, or titanium.Big difference from cheap stuff. highly recommended

Maid a burner 85 holes then someone liked the job so maid another still cutting as good as new.

Absolutely worth spending the money on, do it right the first time, as they say! Makes nice clean holes, and can make a nice chamfer/de-burred edge when cutting metal plate. I would recommend using a punch to reduce the likelihood of the bit wandering.

Happy with product, great deal , well built,thanks

Factory sealed never opened exactly what I needed

Je fais de l’antirouille et je fais des trous dans les portières la voiture et c’est l’outil parfait

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I bought this after looking at countless drill bits to find the best one for drilling out the endjack for guitar pickup install. It is a high end $3000. guitar so if I am taking a drill to it i any way, shape, or form, it needed to be the best. A fine guitar is made of fine woods and a fine finish so a drill bit which rips or tears at the finish or even leaves a scratch or rough spot at all is a deal breaker. This bit was easy to use, sharp, and made a very nice clean hole for my endpin jack install. I don't typically write reviews but wanted to write one for this bit for the benefit of other guitarists that are looking for the right drill bit for installing endpin jack for their pickup. The pickup I installed was a K&K pure mini and the guitar is my Martin CEO-7. I had never installed a pickup before and this 1/2 inch unibit worked perfectly. It will get the job done neatly. Of course, make sure you also use blue painters tape on any guitar to protect during drilling.