Check the listing for details. Stanley Proto JSCVM15 Reverse Ratcheting Combo Spline Wrench, 15mm. Condition: New. Listed at 27.79 USD. FEATURES: Metric Spline wrenches can be used on metric 4, 6, 12 point spline and Torx fasteners. The chrome-vanadium switch lever allows for easy changes in turning direction which helps improve speed. 15Degree angled offset box end helps keep shank clear of obstructions. Chrome-vanadium box ends and switch levers provide high strength and durability. Box end is countersunk for easy application to the fastener. Spline design was created for use with speciality 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 applies force over a larger area, reducing risk of fastener scoring and helps prevent rounding of the corners and other fasteners damage that could lead to Foreign Object Damage (FOD).