The Manfrotto 042 Extension Arm is a 19.6cm extension arm that plugs into the Super Clamp and allows use of either the standard stud or a 5/8" diameter adapter.
Ideal for hanging a light or a camera from a pole and is a great accessory for your clamp. A 013 Double Ended Spigot with 3/8 and 1/4"-20 threaded tips is included in this package.