Set of 4 square hole chisels, hollow steel chisels, woodworking tools set (1/4-1/2-5/16-3/8 inch)

General Description: Professional design ideal for drilling square holes in wood with a mortiser. This set of high-speed steel chisels is perfect for the building, renovation, and decorating industries. Technical Specifications: Material: High-speed steel; Chisel sizes: 1/4" (6.4 mm), 5/16" (8 mm), 3/8" (9.5 mm), 1/2" (12.7 mm); Finish: High hardness, elongated center, high concentricity. Compatibility and Accessories: Fits all drill machines and attachments. Note: The square hole requires the use of a drill, hammer, or other tools (not included). Application: This set of chisels reduces the workload for construction workers while speeding up the work and reducing costs.