Proto combination wrenches are used for fastening or loosening stubborn nuts and bolts for applications in automotive repair & maintenance services. These ratcheting wrench sets feature an arc design that increases the contact surface between wrench and fastener, thereby providing an effective grip & a contact area larger than the conventional wrenches. They have a patented ASD (Anti-Slip Design) facility equipped with a locking groove to prevent slippage and minimise the chances of knuckle strains. The unribbed / unserrated construction and flexible head of these wrenches further keep the fasteners damage-free from scratches or abrasions and allow access into hard-to-reach places, respectively. Choose from a wide range of these Proto wrench sets, available in fully polished and black-chrome finish variants on Raptor Supplies.