Support30 daysReturn Policy Answer Within24 hours FreeShipping Description Features: This is the New HSS Steel Large Step Cone Drill Titanium Bit Set Hole Cutterwhich is made from high quality HSS steel and with the Titanium coated to reduce friction and heat. It is very suitable for using to cut holes in a variety of materials including steel brass wood plastic etc Type: Step Drill Bit Material: High speed steel HSS Coated: Titanium Coated Sizes: 4 32mmï¼ˆ4ï¼Œ6ï¼Œ8ï¼Œ10ï¼Œ12ï¼Œ14ï¼Œ16ï¼Œ18ï¼Œ20ï¼Œ22ï¼Œ24ï¼Œ26ï¼Œ28ï¼Œ30ï¼Œ32mmï¼‰ 4 20mmï¼ˆ4ï¼Œ6ï¼Œ8ï¼Œ10ï¼Œ12ï¼Œ14ï¼Œ16ï¼Œ18ï¼Œ20mm 4 12mmï¼ˆ4ï¼Œ6ï¼Œ8ï¼Œ10ï¼Œ12mm Package Included: According to your choice. Note: Please allow minor errors due to manual measurement. Thanks for your understanding. Monitors are not calibrated same item colour displayed in photos may be showing slightly different from the real object. Please take the real one as standard.