Features: Features Two-Part Splinted Wrench for Removal and Replacement of Free-Wheel Drives Pulleys Found on-B. 10-Millimeter by 12-Millimeter Point End for Locking the Alternator. 33-Spline Cylinder on Shaft Inserts into Pulley Locking Bolt. Use with-1/2-Inch Drives Tools. The two-part splinted wrench required for removal and replacement of free-wheel drives pulleys found on Alternators 10mm x12 point end locks alternator while 33-spline cylinder on shaft inserted into pulley locking boltSpecifications: Material:MetalLength:Approx.11cm/4.33''Package Includes: 1x Alternator Pulley Socketnote: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.