swivel for kelly bar accessories
1,Designs uniquely novel 2,the bearing pressure bearing completely selects import 3,good quality and using long time
kelly bar drive head and upper fitting,which uses bearings to rotate kelly bar and prevent steel wire rop breakage.Designs uniquely novel,the bearing pressure bearing completely selects import,using for long time.
It is suitable each kind to turn on lathe digs the drilling machine.
swivel for kelly bar accessories
