IAF1019 Features: * Size: 5/16" * Spring loaded pilot “pops” the slug from the cutter * Low cost sheet metal hole-making * Made in the USAWhen you don’t have a lot of holes to make, Blaircutters™ provide fast, accurate holes in materials up to 3/16" thick. Blaircutters™ are annular cutting tools that cut around the edge of the hole and eject the center as a slug. Because they’re hollow there’s no dead zone as with twist drills. And unlike hole saws, that rip and tear through the material, they quickly give you a quality, virtually burr-free hole. * ""13,000 Series"" Blaircutters - 5/16""(3 Pack) Includes: * Includes 3 in a pack Warranty: * 1 yr warranty on material and workmanship