NOGA SP1007 4-In-1 Deburring Set INCLUDES: (1) RB handle.(1) O-Ring blade.(1) RD16.5 rotodrive countersink.(1) RDE18 external rotodrive countersink.(1) Thread cleaner blade.(1) Each of S100 & S150 blades. Deburr, Clean, Finish & Countersink 4-in-1 Set designed to handle most deburring, cleaning, finishing and countersinking applications.