- 6mm Saw Drill Bit Reamer Titanium Coated Hole File Reamer Router.- 12.4mm 90 degree HSS Chamfer Chamfering End Mill Cutter Bit.- 4-12mm HSS Step Titanium Cone Drill Hole Cutter Bit Set Tool.- 8-20mm Umbrella Drill Bit round Shank Set Cone Cutter- Suitable for use in the following work which the hardness below 25 degrees such as carbon steel， thin plate， insulation board， PVC board.- Ideal for recessed screws and cabinet workSpecification:Saw Drill， Step drill， Umbrella Drill and Chamfering，Total in 4pcs.All the drill are round shank.Material: HSSSurface treatment: Titanium Coated.Saw Drill: 6mmStep drill: 4-12mmUmbrella Drill: 8-20mmChamfering: 12.4mmPackage Include:1x Saw Drill1x Umbrella Drill1x Step drill1x Chamfering