Dude Tools SD1 Simpson Dude Buster Socket for 1" Nut Bolt with 1 2" Drive Hatchet Handle of high tensile strength Handle of high tensile strength exceeds hand power limit light weight material is corrosion resistant and flame retardant Ultra high performance filters protects against UV And IR Special turnover headband mechanism allows for greater comfort and reduces fatigue Utilizes high performance solar cells w 2 replaceable CR2450 batteries as power back up Complies with DIN The socket is used for high strength 1" diameter bolts and threaded rods that require a heavy hex nut The Dude Tools SD1 1" Simpson Nut Buster Deep High Impact Socket is designed for the Heavy Hex Nuts supplied with the Simpson Strong tie steel panels making the installation quick and clean