Designed to work exclusively with MAXTRAX XTREME and MAXTRAX MKII Our Combo pin set will allow you to mount 1 set of MAXTRAX XTREMES along with one set of original MKIIs. Genuine MAXTRAX Mounting Pins are the easiest, safest, and most secure mounting solution for putting your MAXTRAX on a roof rack or cross-bars. Constructed from high-quality black nylon and stainless steel, these quick-release pins can hold one set of XTREMES and one set of MKIIs (4 total boards.) Top roof rack manufacturers, including Rhino Rack, Eezi-Awn, Front Runner, and more, make a reciprocal bracket that allows for a bolt-on roof rack mounting solution. Designed exclusively for MAXTRAXthese cannot be used with any other brands. The design also permits a TSA-style padlock to be run through the top of the pin to keep your MAXTRAX XTREME securewe recommend a bicycle cable lock if your security requirements exceed this.   Weight: 1 pound Size: 6.5 inches long including an inch-and-a-half shaft of 10mm diameter thread that can be cut to length if required. SS Nylock nuts & flat washers are included. Warranty: Lifetime warranty against faulty materials and workmanship. Shipping: Calculated at time of checkout.