Description Protects winches from theft. Substitute one of your winch mounting bolts with the “Winch Lock” bolt. The winch lock bolt is a custom 3/8-16 precision security bolt made from 1045 carbon alloy steel heat treated to Grade 5 yield strength. The key patterned head bolt is proprietary and the matching key is not available at your local retail hardware store. The winch lock bolt cannot be removed with ordinary screw drivers, pliers, or commonly sold security bits. Fits all winches with standard 3/8 -16 mounting hardware- shank length 1.25 inches Made from heat treated 1045 carbon steel, zinc chromate corrosion protection Proprietary security key pattern Hidden spring lock washer pocket ensures gapless installation 60 degree head taper to prevent removal with pliers Simple fail proof design : no clumsy traditional key mechanisms to corrode/fail Special coded security key allows for both end, and side access Check out the Factor 55 Truck/SUV Catalog Specifications Head Type Key Patterned Tapered Head Thread Size 3/8 Inch-16 Material Steel Quantity Single