The Snap-on 1/2" Drive 14mm Subaru Head Bolt Socket, No. S6214A, has a drive configuration that allows for use of proper capacity torque wrenches that are required for setting specified torque on cylinder head bolts. Overall socket length is optimized to clear valve train components and maximizes working space between the cylinder head and uni-body frame. Technicians can use proper capacity torque wrenches while the engine is still in the chassis. It's precision machined from special steel with higher alloy content and heat-treated for optimum strength and durability. The S6214A is designed for cylinder head bolts in a majority of Subaru vehicles (2005 and newer) with horizontally opposed flat boxer engines.