The MAXTRAX XTREME Mounting Pins are designed to work exclusively with MAXTRAX XTREME 

Designed exclusively for MAXTRAX XTREME—these cannot be used with any other brands. Does not work with MAXTRAX MKII. 

Available with either 40mm or 17mm bolt size. 40mm and 17mm refers to the length of bolt used to mount the pins- both the 40mm and 17mm pins will hold either one or two sets of MAXTRAX.