Feature

●Set of 4 Square Hole Drill Bits, 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm) Drilling Core - Over 210mm
●Made of high-speed steel Heat Treatment, HRC48-50, High Hardness, Longer Core, High Concentrifugal
●Large for sharp square holes in wood with mortise machines or mortise accessories
●Fits all mosaging machines and drill press accessories The square hold drill is primarily used on the side of woodworking
●Professional wooden drill bits suitable for construction, installation, remodeling, decorating industries and more

Description

Specifications: Material: High Speed Steel Hardness: HRC48-50 Size: 1/4 inch (6.35 mm), 5/16 inch (7.94 mm), 3/8 inch (9.5 mm), 1/2 inch (12.7 mm) Clamp Shank Diameter: 0.7 inch (19 mm) Round Drilling Core Length: 8.3 inches (210 mm) Package Includes: 4 mm)