Description: Durable: Bench drill locator set made from high quality metal, after heat treatment, this mortising attachment accessory has high hardness and concentration, fast drilling speed, and it is more durable and efficient. High Efficient: The mortising attachment can converts your drill press into a mortising tenoning machine for all your square hole drilling needs, make mortise and tenon joinery easily. Wide Application: Bench drill locator set used for woodworking, this bench drill locator set is suitable for mortising and tenoning. This set of chisel mortiser drill bit accessories is ideal for woodworking applications. Powerful: Square hole hollow chisel mortiser drill bit specially designed for drilling equipment, the special design of the drill bit will not be blocked by sawdust, make work more fluid. Package Includes: This Mortising Attachment Kit Complete with 4 mortise chisels , 4 Split Ring Bushing , a chisel holder, a fence, a carrying case, rod holder, wrench, curved rod, slide arm, the bit, the knob, bolt and the nut. Specification: Material: Metal Plastic  Size Chart: Top Hole: 6.5cm/2.56inch Bottom Hole: 1.8cm/0.71inch Package Includes: 1 Locator 1 Press Block 1 Fixed Seat 1 Support Base 4x Tenon Bit 4 Fixing Bolts 2 Side Positioning Rod 4 Fixed Screws 4 Split Ring Bushing 1 Wrench 1 Connecting Rod Note: Please allow slightly errors due to manual measurement and different monitors.