Summit Racing™ Head Bolt Drill Jigs

Summit Racing™ Head Bolt drill jigs are dual-use tools you will want to add to your tool arsenal for engine machine work, especially when boring and honing cylinder bores. The drilling template also serves as a torque plate when converting from M11 studs to 1/2 in. head studs. Our torque plate drill jigs are crafted from aluminum and anodized red. Features, specs, and notes: * Torque plate works with M11 and 1/2 in. bolt sizes * Ten stepped drill bushings included for enlarging head bolts to 1/2 in. * Torque the studs or bolts to manufacturer's specs with recommended lube * A few 7/16 in. or 1/2 in. washers may be required on top depending on the exposed threads of the fastener * See suggested or required items for solid dowels if using plate as a drilling template. Show Less