These will fit many larger bits that will not fit in most vises. It's a little awkward to hold when cleaning a lot of the holes I use it on. I'm not complaining though, it does its job well and has a good "feel" for the delicate work I do with standard sized bits like 1/4". The handle could have been better plastic - but im In general, I recommend it if you need such a tool and plan to use it frequently.