Specification: Brand newMaterial: HSSOptional Size: 1/8″, 3/16″, 1/4″, 5/16″, 5/32″Color: as picture showsQuantity: 5pcs60° tip anglesApplicable hardness: HRC40 or lessUse: suitable for positioning and Chamfering processing before drillingGeneral Materials centering hole machining and chamfering machining. Using cobalt high speed steel materialCutting fast, good chip evacuation, edge clear, sharp and durable, the drill shank has a specification lettering(Without protecting chamfers composite center drill)Package included:5pcs x center drill bitsNote:Please allow 1-5mm errors due to manual measurementItem color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same