1、Labor and Time Saving: Woodworking mortise positioning tool adopts handle design which saves effort, woodworking embedded chisel can reduce the labor of construction workers. Thus saving time and achieving better work efficiency. 2、Suitable Socket Diameter: Woodworking mortise drill positioner kit is suitable for drill machine with socket diameters of 53mm or 2.1in, 55mm or 2.2in, 58mm or 2.3in, 60mm or 2.4in. 3、Square Hole Set Open Size: Mortise drill locator has the square hole open for 6.4mm or 1/4in, 8mm or 5/16in, 9.5mm or 3/8in, 12.7mm or 1/2in. 4、Steel Material: Woodworking drill positioner set is made of steel material, strong and durable, and can firmly hold wood. 5、Versatile Use: Table drill locator can be used for round, square and special square, also suitable for round slots, internal grinding, metal drilling, etc.