Designed to secure 2 or 4 (1 or 2 pairs) of MAXTRAX MKII 4WD Recovery Tracks. Glass-filled Nylon and stainless steel quick-release pins for securely mounting your MAXTRAX on a roof rack, mount, or crossbars. The set includes 4 pins to securely hold 2 or 4 MAXTRAX MKII 4WD Recovery Tracks, 4 stainless steel Nyloc nuts, and 4 flat stainless steel washers. There's a hole in the top of each mounting pin to fit a small padlock. These pins are produced with 17mm of M10 thread to suit applications where 40mm is too long. 17mm is also the perfect length to suit our MAXTRAX Flat Rack Mount * Designed specifically for MAXTRAX MKII 4WD Recovery Tracks (NOT INCLUDED).