Features 1、Made of premium Carbon Steel,with high hardness, durable in use 2、Application: suitable for the bench drill and electric hand drill. The bench drill is recommended for the easy positioning. 3、8 Piece plug cutter set makes perfect plugs for counter-bored holes 4、Chamfered cutters make tapered plugs to fill countersunk holes. 5、The cutter set achieves excellent finish when using same timber Specification Features: Made of premium Carbon Steel,with high hardness, durable in use Application: suitable for the bench drill and electric hand drill. The bench drill is recommended for the easy positioning. Chamfered cutters make tapered plugs to fill countersunk holes. The cutter set achieves excellent finish when using same timber Specification: Material: high carbon steel Shank: round shank Specifications: 6mm, 10mm, 13mm, 16mm Package list: Note: the speed should not be too fast, otherwise it is easy to produce smoke, burned black and so on. Package List