Description: Specification: Material: High Speed Steel Size: 6.4mm/8mm/9.5mm/12.7mm/14mm/16mm (Please choose the size you want) Quantity: 1 x Square Hole Drill Bits Use matters: Square hole drill is mainly used for woodworking aspects. Features: 1. Hisel angel is mainly used for wood working: Mahogany, wood board, particle board, medium density board 2. Bearing Steel manufacturing, hardness is good. 3. Standard chip design, easy to remove the side of wood chips, improve drilling efficiency. 4. Special Techonology production, durable and not easy to break. 5. Arc design, exquisitre sharpen durable. 6. Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries. 7. The square chisel mortiser combines the cutting of a four-sided chisel with the action of a drill bit in the center. 8. The bit clears out most of the material to be removed, and the chisel ensures the edges are straight and clean. 9. Hollow Mortising Chisel Bits are for making square mortises in one stroke and oblong mortises with each succeeding stroke. 10.Applicable machines: square tenon machine, square hole drill (Note: can not be used for manual drills, bench drills, etc.) Package Included: 1Pc x Square Hole Drill Note: 1.Please allow 0.5-1 inch difference due to manual measurement. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.??????Square Hole Drill Bits???: The Drill square holes need to fit a square hole mortise and tenon machine to use. Great for drilling square holes in wood with a mortising machine or a mortising attachment Square hole drill is mainly used for woodworking aspects??????Material???: Made of high-speed Hardened steel, lengthened core, sharp cutting edge, continuous blade, quick cuttings, high efficiency, durable and practical, heat treatment, long life.??????Advantage???: High performance flute design geometry for superior chip extraction Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries??????Convenience???: The spiral twist drill bit can be drilled into the wood very smooth and quickly. The comminated material can be quickly discharged from the tube.??????USE TO???: Use for the opening square hole, suitable for construction, installation, renovation, decoration industry, etc.