4pcs 1/4 5/16 3/8 1/2 Inch Square Hole Drill Bits Square Hole Mortising Chisel Woodworking

Label:Yes [Anti Bursting Design] The cutting force is distributed in a single plane, which helps minimize the risk of bursting at the start of use. [Universal Shank & Stable Clamping] The universal shank type features a rounded drill tail design for more stable clamping. [Wide Application] Suitable for square hole drills and square tenon machines, covering a broad range of woodworking tasks. [Overall Heat Treatment] With overall heat treatment, these bits achieve high hardness and a long service life. [Efficient Chip Discharge] U shape chip grooves help with the smooth discharge of wood chips and improve drilling efficiency.

Condition: Unused Item Type: Square Hole Drill Bits Material: Bearing Steel Color: Silvery 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 / 0.2in 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 Square Hole Drill Bits Note: Cannot be used on metal, concrete, glass and gypsum board.