Great for cutting holes in wood with a mortising attachment machine Square hole drill is mainly used for woodworking aspects High performance flute design for superior chip extraction Reduce Labor intensity of construction workers, speed up the construction speed, reduce construction, installation, renovation, decoration industries Use for the opening square hole, suitable for construction, installation, renovation, decoration industry, etc. Characteristics: 1. The square hole cant be used on electric drills, no need to drill square holes to use it. 2. Mortise and tenon square hole drilled by the terrible + outer sleeve in the middle of the combination. 3. Workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration dustries. 4. Various existing end caps, can only be made through a round hole, a square hole can not be processed, to make a square hole, please turn the hole or machine cutting hole, and then make a neck hole. 5. The utility model placed in the hole opened by the old body, while hammer operation, the material crushed round hole and square wall, at one time square hole processing process, and the nozzle can be removed from the tube. 6. With a variety of square hole specifications, adjust the appropriate power of the square hole machine, you can get a square hole to meet your requirements. Specification: Name: Square Saw Material: High-Speed Steel Size:6.4mm, 8mm, 9.5mm, 12.7mm. Use matters: Square hole drill is most often used for craft purposes. Scope of delivery: 4 pcs. Note: Due to manual measurement, there may be differences in dimensions of 1-2 cm. Product color the photos may differ slightly from the color of the monitor.