Premium M42 High Speed Steel Cutting Edge. Patent Pending Tooth Set Design optimized to remove material faster. Enhanced Product Life " 2 x"s the life of the old hole saws. 1-15/16" (49mm) Cutting Depth. Side Slot for Increased Leverage for Fast and Easy Slug Removal. Durable 0.05 in. side wall prevents collapsing. External coating reduces side wall friction for efficient cutting. Cap reduces run out and vibration. Type - Holesaws, Assembled Product Weight - 0.83 lbs, Assembled Product Dimensions (L x W x H) - 4.90 x 0.60 x 0.30 Inches