4 Drill Bits + Square Hole Drill Bit Adapter Compatible with Drill Press Mortise Machine

Square Hole Drill Bit Set comes with 1 square hole bit adapter and 4 square hole drill bits, compatible with bench drill and hand drill clamp diameters ranging from 38 to 55 mm/ 1.5 to 2.2 inches. The square hole drill bit adapter is made of steel, can firmly fix the wood, drill machine mounting diameter of different mortise accessories, cutting surface is precision machined, reduce the use of error, specially designed with mortise bit accessories drill bit will not be blocked by wood chips, high hardness, no rolling, cutting speed, the bit is sharp. The bit adapter and the matching drill attachments in 4 sizes easier to use, and the precision design of the drill press mortise attachment ensures that you can drill the right mortise and mortise holes in the fastest way. More faster than mortise machine. This drill bit adapter can reduce labor intensity and improve work efficiency. Appropriate for construction, carpentry DIY, decoration industry, which is compatible with compression board, plastic, density board, sandalwood, pine, ash, pine and other materials with low hardness. Dual Support Bracket, square hole drill bits for wood are reliable and useful, compatible with bench drill and hand drill. Square hole bit adapters are compatible with woodworking, furniture manufacturing and other related industries. Material: steel. Package Contents: 1 x square hole bit adapter, 4 x square hole drill bits.