Designed to allow servicing of Polaris 40 mm ID wheel bearings without removing the wheelshaftWorks with Polaris bearings 3514635 & 3585502, EPI bearings WE301016 and WE305502 or any equivalentHigh quality CNC machined with precision drilled grease channelSimply remove the wheel, brake caliper and hub. Insert Greaser Tool and use your grease gun to pack your wheel bearingsQuick and easy way to extend the life of your wheel bearingsCarefully developed for the highest level of qualityPrecise engineering ensures second to none quality and lasting valueMade to the highest quality standards Front or Rear EZ Greaser (40MMGREASER) by EPI®. Inside Diameter: 40 mm. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials using up-to-date equipment, it ensures everlasting reliability and enduring value. This product is distinguished by total quality assurance, unsurpassed by anybody else.