LighterBro? Pro Multi-Tool constructed of 100% hardened 400 series stainless steel. LighterBro? Pro securely holds a 1/4 inch #3 Phillips screwdriver bit at the bottom of the sleeve. Locking #3 Phillips. 5/16 and 3/16 inch sockets are included. A shackle key or wing nut wrench is conveniently located on the side of the LighterBro? Pro. Two nut grabber wrenches located on the side of the LighterBro? Pro securely grip any size nut or bolt that fits in its jaw.