Security star-drive insert bit, size T40, made from premium S2 steel for a long tool life while driving common or mild steel screws or case hardened screws.

• Premium S2 steel construction
• Lasts 2X longer than standard screwdriving bits
• Drives common or mild steel screws and case hardened screws
• Security star drive, size T40
• Sold individually, 1 bit each

Also available: Century offers this bit in a Pro Pack of 5, and in a 9-piece security star-drive set with a magnetic bit holder.