Proto® JSBV1214 Double End Reversible SAE Ratcheting Box Wrench, 3/8 x 7/16 in Spline Wrench, 5-15/16 in OAL, 12 Points

• Black chrome finish is corrosion resistant and visually distinctive
• Ratcheting spline box end is countersunk for easy application to the fastener
• Spline design was created for use with specialty spline bolts which are used when weight and size of bolt heads must be minimized
• Spline design enables the wrench to contact conventional fasteners away from the corners, which help apply force over a large area helping to reduce risk of fastener rounding
• Spline design also helps prevent rounding of corners and other fastener damage that could lead to foreign object damage (FOD)
• The fractional spline wrenches can be used on fractional 4, 6, 12-point and spline fasteners
• The high contact surface area which is away from fastener points enables turning of highly rounded fasteners
• The chrome-vanadium switch levers allows for easy changes in turning direction which helps improve speed
• Chrome-vanadium box ends and switch levers provide high strength and durability

Warranty: Lifetime

Proto® Ratcheting Box Wrench | Double End Reversible SAE | 3/8 x 7/16 in Wrench Opening | Spline Wrench | 5-15/16 in Overall Length | 12 Points | 7/8 in Open End Width | 7/8 in Box End Width | 1/8 in Open End Thickness | 1/8 in Box End Thickness | Vanadium Steel | Black Chrome | STA-BLKHAW