Yaemart Corportation YaeKoo Square Hole Mortise Chisel Drill Bit Set, HSS Woodworking Hole Saw Mortising Chisel Hole Drill Bits 6/25" 1/4"

7 pcs Square Hole Mortise Chisel Drill Bit Tools, HSS Woodworking Hole Saw Mortising Chisel Drill Bit Set, Different Sizes 6/25" 1/4" 5/16" 3/8" 2/5" 1/2" 9/16" Specification: Material: High Speed Steel(HSS) Hardness: Up to HRC48~50 Shape of hole: square, rectangle Shaft length ( Drilling depth ): -6/25"(6 mm): 45mm -1/4"(6.4mm): 45mm -5/16"(8mm): 60mm -3/8" (9.5mm): 60mm -2/5"(10 mm): 60mm -1/2"(12.7mm): 60mm -9/16" (14mm): 75mm Clamping shank diameter: 19mm (Round) Package included: 1 x 6/25"(6 mm) 1 x 1/4" (6.4mm) 1 x 5/16" (8mm) 1 x 3/8" (9.5mm) 1 x 2/5"(10 mm) 1 x 1/2" (12.7mm) 1 x 9/16" (14mm) Note: * Square hole drill can not be used on an electric drill, drill square holes need to fit a square hole drill drilling (mortise and tenon machine) to use. * To avoid drill bits become overheated and get burned up due to fast rotary friction, we suggest use cutting fluid to keep the bits cold during usage.

View full description