Review on OXMUL Aluminum Multiple Electrician Mechanic by Michael Boyce

Need to drill 60 holes in thick refractory sheet metal ring (from Tractor Supply). Tried my bi-metal hole saw. literally ate his teeth without going halfway through a hole. Ordered - it was slightly larger but the hardness rating is worth it. Drilled ALL 60 HOLES, to a maximum diameter of 7/8" even without resharpening. I used a heavy duty hand drill. This drill is WORTH THE PRICE. Recommended. One thing: with a hand drill you need a *hard* grip, to keep the drill perpendicular to the surface. If the drill jumps or tips, it will bite the metal incorrectly, sticking the sheet metal and gouging. Even then, the drill will harden and even get a nick on the cut surface. Move SLOWLY - feel each one cutting depth.