These high performance drills made from hi-moly tool steel will cut holes in sheet metal, wood or plastics and leave no burr. They will also drill splinter free holes in wood. this special BURROUT point cuts at a circumfrence of the hole to avoid the break through burr problems common with standart point drills. When drilling into higher tensile strength metals such as cold rolled steel, a small pilot hole may prove helpful, since the center spur does not cut agressively.