Proto JSBV1214 3/8″ x 7/16″ Double Box Ratcheting Spline Wrench

Proto JSBV1214 Features

• 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