Impact Performance Series lobular nutsetters are built for maximum durability, performance, and long life with impact tools. Designed to drive the fastener from the side, rather than forcing the corners to turn, maintaining the true shape of the fastener and dramatically reducing breakage and damage from stripping. The lobular design also provides more clearance on the corners of the fastener where paint build-up often occurs. Black oxide finish that resists corrosion and increases the life of the nutsetter. 1/4″ quick-change shank to work with all types of impact and rotary drivers. Shank diameter 1/4. Overall length 1-7/8.