Silverline - PIPE THREADING KIT - 868556 Suitable for threading black gas or galvanized iron pipes. Kit contains four die heads, two piece tubular steel handle and a compact ratchet head. Cast iron die heads with four alloy steel chasers per head for clean accurate thread cutting, each die head has four swarf removal holes. Die sizes 1/2", 3/4", 1", and 1 1/4" BSP.