Collet kits are available in a range of sizes. The 3/8" is typically used in most applications.
The large brass collet nut is knurled to assure the diver of a solid grasp and acme threads prevent binding from mud or other debris insuring quick reliable underwater welding and cutting rod insertion and retention. Interchangeable collets accommodate various diameter underwater cutting rods.
Kits come with washer.
Contact us directly to order other sizes.