Fits OEM & Aftermarket bearings UTV and ATV bearings constantly fail due to water, dirt, sand, and lack of grease These tools will replenish the grease your bearings need, as well as push out contaminants Simply insert tool into your bearing and pump grease through Zerk fitting with your grease gun Double O-Ring seal to keep the grease inside of your bearings O-ring seals also spread the inner bearing races apart to allow a gap for the grease to easily flow inside Machined from 6061 Aluminum Fits all Polaris UTV and ATV wheel bearings with a 44MM and 40MM inside dimensions Works with all aftermarket and OEM bearings Made in the USA This is a 2 pack kit !!!! Bearings in pictures is not included, for demo purposes only. *Ships from Wisconsin, usually same or next day!!