Seal type caged ball bearings on load sprocketLiftHand Chain Block Seal type caged roller bearings on main shaft (Minimize manual effort thanks to efficient drive train)Main Shaft for Chain Block Superior design of top hook holders for double / several columns of load chainsExperience exceptional durability thanks to all-steel construction featuring rugged gear case enclosure and handwheel coverEnjoy increased lifting height thanks to low headroomGrade 100 heat-treated alloy load chain resists abrasion and wear while minimizing chain weightReinforced double pawl brake system and larger dia. pawl springs ensure reliable brake Website:http://www.hoistlifting.com