Bi-metal hole saw set, long lasting, fast cutting and versatile. Up to 2x life in metal cutting. Enhanced tooth geometry, a thin kerf design, and an advanced coating contribute to the efficiency of the cutting process. Easy plug removal. Speed slot features a staircase design for easy plug removal. The slot is wider than most and is placed lower on the hole saw with multiple leverage points to easily eject the plug with a standard screwdriver. The set contains: 6 Hole saws (7/8", 1 1/8", 1 3/8", 1 3/4", 2" and 2 1/2"), 2 "Snap-Back" mandrel (2L, 5L) and a mandrel adaptor.