Features and Benefits:Size: 3/8"Includes 3 in a packSpring loaded Pilott “pops” the slug from the cutterLow cost sheet metal hole-makingMade in the USAWhen you don’t have a lot of holes to make, cutters provide fast, accurate holes in MATterials up to 3/16" thick. cutters 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 MATterial, they quickly give you a quality, virtually burr-free hole.On Sep-21-15 at 14:03:32 PDT, seller added the following inforMATtion: