Tool Chest

Bosch Self-Centering Bit Assortment


Foolproof pilot holes

For this week’s Cool Tools review we’re going to take a look at this self-centering drill bit set from Bosch. Great for makers and DIY home repairs. I wish I’d bought these years ago.

If you’ve ever tried to attach some pre-drilled piece of hardware to something — a hinge, a latch, a coat hook — you’re probably familiar with the challenge of placing the hardware, marking where the holes need to be, and then carefully drilling. But if your pilot holes are just a little off — even in just one hole, the whole placement of the hardware will shift. It bugs the crap out of me.

A self-centering drill bit makes this process foolproof. The bit has a spring-loaded collar that sits into the hardware you’re attaching and keeps the drill bit dead-center. So long as your hardware doesn’t shift, the holes will be perfectly center.

This set from Bosch comes with three common bit sizes — a #6, #8 and #10. They’re also a quick change design that can just drop into an impact driver, making it easy to drill and screw with the same tool.

I will say that if you’re only using this occasionally, you could spend less and just get the smallest size. That will give you a centered pilot hole that you can expand with any regular drill bit. That said, for bigger projects, having the right size bit keeps you from having to drill the same hole twice.

-- Donald Bell 01/30/18