Body, Pin and Grip: steel 12L14, zinc plate yellow chromate finish.
Stainless Steel Type-
Body, Pin and Grip: 303 series stainless steel.
Spring loaded pin is non-locking, pin simply springs back when grip released.
A nylon locking element on thread reduces chance of loosening of thread due to vibration etc.
Metal grip for more robust handling.
For suitable locknut, see part no. SL18