The proven original SST drill bit is now available featuring an exclusive Quick Shank that ensures fast and secure tightening inside any keyed or keyless chuck. Ideal for cordless drills, allowing you to drill more holes per charge. Recommended for drilling aluminum, non-ferrous metals and thin gauge metal, where a jobbers length bit is required. Now made with cobalt blend for longer life. Back tapered body. Self-centering speed tip. New quick shank. Special bronze SST surface treatment.