【FAST & SMOOTH CUTTING】The sharp tooth edge design makes the cutting smooth and fast. The spring on the drill is very good because it automatically pushes the disc out of the saw after completing the hole. Best Hole Saw Kit (2025 The main body and the cutting edges of the bi-metal hole saw consist of two different tool steels (bi-metal). 【HIGH-QUALITY MATERIAL】Hole Saw Set is made of high quality Bi-Metal. Milwaukee Tool Hole Dozer General Purpose Bi-Metal Hole Saw Set (28-Piece) | The Home Depot Canada Package Included: 12 x Hole Saw Cutters. (SOLD) Drillpro 12pcs 15mm-50mm Hole Saw Cutter Alloy Drill Bit Set for Wood Metal Cutting 【SUPERIOR PERFORMANCE】The varied and fine toothing ensure that the hole saw does not get caught in the material and runs smoothly. Bi-metal hole saws have a larger number of cutting edges than carbide hole saws, which allow a clean cut. 【TOOL CASE SET】A set of tool cases convenient for carrying around. Nylon Flat Washers 3/4 Inch 13-Piece Shark Tooth Bi-Metal Hole Saw Set | Cuts Metal, Wood, & More Plumbing Repair Washers Large size and ample capacity.