Woodwork 1/4" Square Hollow Chisel Mortiser Bit Tool Product Name: Square Chisel Mortiser; Material: Metal Chisel Side Length: 6mm / 1/4"; Chisel Depth: 50mm / 1.96"; Bit Shank Diameter: 4.2mm / 0.16" Bit Width (Bottom): 6mm / 0.23"; Flute Length: 65cm / 2.56" Shank Diameter(Max): 19mm / 0.748"; Weight: 117g Package Content: 1 x Square Hollow Chisel Bit Mortiser