... type Welding Holder,Weld Holder,300A,500A,800A 1.Material of handle:Nylon or glass fiber. 2.Jaw:brass or iron Japanese type Welding Holder ... ,Weld Holder,300A,500A,800A1.Material of handle:Nylon or glass ... ,we also manufacture other types welding holders,such as Korean type,Germany type,American type,Holland type etc.