Item Description:Features:- Arc design,sharpen durable.- Mainly used for wood working: rosewood, board, shaving board, MDF board.- Standard chip design, easy to remove the side of wood chips, improve drilling efficiency.- The chisel mortiser combines the cutting of a four-sided chisel with the action of a drill bit in the center.Specifications:Material: High speed steelOptional size: 10mm/16mmPackage included:1 x Woodworking Hole DrillItem Specification:DIY Supplies: WoodworkingType: Center Drill Bitlength: 203/208mmUse: Wood Drillingis_customized: YesMaterial: High Speed Steel