ITEM NAME:8pcs Wood Plug Cutter Claw Cylinder Tenon Drill Bit Set Woodworking Cork #JT1 Product Description Description: 8pcs Wood Plug Cutter Claw Cylinder Tenon Drill Bit Set Straight Tapered Woodworking Cork Drill Bit Knife Cutting Tool Features: Application: suitable for bench drill and electric drill, recommended bench drill, easy centering. 1/4": handle diameter 10mm/0.39", can take wood diameter 6mm/0.24", can take wood length 22mm/0.87" 3/8": handle diameter 10mm/0.39", can take wood diameter 10mm/0.39", can take wood length 23mm/0.91" 1/2": handle diameter 10mm/0.39", can take wood diameter 13mm/0.51", can take wood length 25mm/0.98" 5/8": handle diameter 10mm/0.39", can take wood diameter 16mm/0.63", can take wood length 26mm/1.02" The four specifications of the British and metric cork drills are the same, but the marking difference between them!!! Specifications: Material: high carbon steel Handle: a crank Specifications: the metric is 6mm/0.24", 10mm/0.39", 13mm/0.51", 16mm/0.63" The British specifications are 1/4", 3/8", 1/2", 5/8" (inch). Attention: speed should not be too fast, otherwise it will produce smoky, scorched black and so on. Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3mm measuring deviation due to manual measurement. Included: 8 x Wood Plug Cutters.Included: 8 x Wood Plug Cutters. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. If item is defective after 3 months, you can still send it back to us.