Slugger cutters are designed to outperform the competition! Slugger HSS has an outstanding combination of some of the largest flank and rake angles. A larger rake angle avoids putting excessive energy into bending the chip. A larger flank angle helps withstand tooth wear. Designed to cut up to 1" in depth, these cutters should always be accompanied by a coolant. Can increase productivity by up to 60% compared to standard drill bits in steel. Mounting:3/4" Weldon Fits: Most common magnetic drills (except Nitto) Recommended Materials: Mild Steel