The MAXTRAX XTREME Teeth Replacement Set Includesdes 22 anodized alloy teeth to suit MAXTRAX XTREME 4WD Recovery Boards (not compatible with MAXTRAX MKII). All of the teeth on the MAXTRAX XTREMES are the same shape and size, so you can replace any damaged tooth with any of these replacement teeth, a quick and easy task using the XTRACT Insert Tool (sold separately). Note: This product is not compatible with MAXTRAX MKII Recovery Tracks.