Hole Drill Bits, Broca Cuadrada para Madera 4 Pcs 1/4 5/16 3/8 1/2 Bearing Steel Wood Drilling Hand Tools, Brocas Cuadradas para Madera for Woodworking, Hardwood, Oak, Mahogany

1. With overall heat treatment, making it has high hardness and long service life. 2. U‑shaped chip grooves, facilitate the discharge of wood chips and improve drilling efficiency. 3. The force is in a plane, which is effectively protected and can avoid the situation of bursting at the beginning. 4. Universal shank type, the drill tail adopts a roun designed, which makes the clamping more stable. 5. Wide application, suitable for square hole drills and square tenon machines. Specification: Item Type: Square Hole Drill Bits Material: Bearing Steel Color: As picture shown Uses: Suitable for wood products such as density board, medium fiber board, particle board, wood, etc., suitable for square hole drills and square tenon machines Specification: 1/4, 5/16, 3/8, 1/2 SpecificationHole SizeShank DiameterGrooves DepthTotal Length 1/46.4mm /0.3in4.1mm / 0.2in45mm/ 1.8in170mm / 6.7in 5/168mm / 0.3in5.5mm / 0.2in60mm / 2.4in200mm / 7.9in 3/89.5mm / 0.4in6.5mm / 0.3in60mm / 2.4in210mm / 8.3in 1/212.7mm / 0.5in8.5mm / 0.3in60mm / 2.4in210mm / 8.3in packing list: 4 x Square Hole Drill Bits Notice: Cannot be used on metal, concrete, glass and gypsum board.

• Heat-Treated Hardness: The drill bit undergoes comprehensive thermal processing to enhance structural integrity and retention. This treatment ensures consistent performance through extended use in demanding woodworking applications
• Optimized Chip Removal: U-shaped flutes along the shaft efficiently channel wood debris away from the cutting surface. This design prevents clogging while maintaining clean bore walls and reducing friction during operation
• Stable Entry Control: Engineered with a balanced cutting geometry that distributes forces evenly across the bit surface. The tip design prevents wandering and minimizes tear-out during initial material penetration
• Secure Shank Connection: Features a precision-machined round shank that maximizes chuck grip stability. The uniform cylindrical design eliminates slippage even under high-torque drilling conditions
• Versatile Joinery Applications: Compatible with both square hole boring systems and traditional mortising machines. The bit's geometry produces clean, accurate cuts in various wood densities for furniture-making and cabinetry projects