Woodworking Accessories Woodworking Drill Bit Heat Treatment Hole Drill for Density Board Hole Drills Tenon Machines Particle Board Specification: Condition: Item Type: 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 hole drills and tenon machines Specification: 1/4 5/16 3/8 1/2 SpecificationHole SizeShank DiameterGrooves DepthTotal Length 1/46.4mm / 0.3in4.1mm / 0.2in 45mm/ 1.8in170mm / 6.7in 5/168mm / 0.3in5.5mm / 0.2in 60mm / 2.4in200mm / 7.9in 3/89.5mm / 0.4in6.5mm / 0.3in 60mm / 2.4in210mm / 8.3in 1/212.7mm / 0.5in8.5mm / 0.3in 60mm / 2.4in210mm / 8.3in Package List: 4 x Hole Drill Bits Note: Cannot be used on metal concrete glass and gypsum board.