Precision square-hole mortise chisel drill bit set for most mortising machines — engineered to cut clean, square mortises with durable high speed steel construction. Key benefits Accurate square holes: Designed specifically to cut square mortises cleanly and consistently, reducing hand-chiseling and cleanup time. Broad compatibility: Fits most mortising machines, making this set a flexible addition to any workshop. Long-lasting performance: Made from high speed steel for improved wear resistance and durability across repeated use. Better productivity: Faster, more predictable cuts help you complete joinery and repair tasks more efficiently. What it does Cuts precise square holes (mortises) for mortise-and-tenon joints, hinge pockets, and other joinery. Works with mortising machines to deliver uniform results that improve fit and finish. Who it’s for Professional woodworkers who need a reliable, precise tool for repeatable joinery. DIYers and home crafters who want durable, easy-to-use bits for cabinetry, furniture repair, and hobby projects. Performance and material Material: High speed steel (HSS) for strength, wear resistance, and extended service life. Function: Square-hole mortise chisels and drill bits designed to produce clean, accurate mortises when used with compatible mortising machines. Durability: HSS construction resists wear under typical woodworking conditions to provide consistent cutting performance. Practical applications Cabinetmaking: Cut accurate mortises for rails and stiles to ensure tight, long-lasting joints. Door and hardware installation: Quickly form hinge pockets and lock mortises with uniform depth and square corners. Furniture joinery and repairs: Produce clean mortises for mortise-and-tenon joints in chairs, tables, and frames. Usage notes Check machine compatibility before use; designed for most standard mortising machines. Follow standard safety and setup procedures for your mortising machine to ensure accurate alignment and safe operation. This set offers a dependable combination of compatibility, precision, and durability for professional and hobbyist woodworking tasks requiring square mortises.