My BIL found these on Amazon. Bought one for his CanAm (Red tool). Was totally impressed by how much grease actually went in the bearing. Bought 2 more for my sisters Polaris (different sized front and rear bearings!). Slightly different application. The CanAm tool fits in with the knuckle off, the Polaris tool fits over the axle. For the price, if it saves one bearing change, they've paid for themselves.