Universal Fitment -- Fit for Spicer drivelines 1610, 1710, 1760, 1810, 1880, -- Fit for Meritor (Rockwell) 16N, 17N, 18N, 1710, -- Fit for Spicer SPL 140, 170, 250 "Life Series", -- Fit for Meritor RPL 20, 25 "Permalube" Series. (Designed to work with U-Joint bearing cups from 1.5" to 2.2" and will fit virtually all Class 6-8 Trucks and Machinery) Easy to Use STEP 1 - Remove all fastners from bearing cups STEP 2 - Slip the U-Joint puller over the yoke of the driveline STEP 3 - Turn the tool's forcing screw clockwise with a hand or impact wrench (NOTE:reserve thread) The U-Joint Puller may be used with up to a 1-inch impact wrench .