IRWINTools IRWIN 10239CB Unibit 2-Steps Cobalt Alloy Steel Step Drill Bit for 1/2-Inch and 3/4-Inch KO, Black

Happy with product, great deal , well built,thanks

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

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.

A very good quality tool.

we use them to drill holes in car doors and rocker panels to undercoat, this is the best brand we have found