Features: 1.Fittment:Works for class 6-8 transportation trucks and equipment. | For Kenworth, for Peterbilt, for Freightliner, for Mack and for Volvo, etc. | For yokes with a bearing diameter between 1 7/8” and 2 3/16”. | For Spicer and for Meritor 1610, 1710, 1760, 1810 Series. For Spicer SPL 140, 170, 250 Series. For Meritor/Rockwell RPL 20, 25 Series. 2.Material:Flexibility in caps design to serve a variety of class 6-8 trucks. To extend the life of the forcing screw, the pull bar is precisely milled with a chamfer. High-grade steel with black coated for rust and corrosion resistance, hardened construction for high strength and impact resistance. .