Designed to allow servicing of Polaris 44mm ID wheel bearings without removing the wheel shaft. Works with Polaris bearings 3514822, 3514699, 3514924 & 3514627. Grease your wheel bearings without removing the axle or suspension components on a Polaris ATV with 44mm wheel bearings.Simply remove the wheel, brake caliper, and hub; insert the tool into the bearing and guide the axle through the center bore.