Light stand head combined with 1/4inch thread screw Designed to directly insert into a light stand / rod Internal column diameter measures up to 16mm /4inch thread hole & locating pins available Features quality-upgraded locking ratchet knob Tough, resilient and light weight The Light Stand Head features quality-upgraded locking ratchet knob, it is designed to be directly inserted into a light pole and fastened by lever thumbscrew knob, super easy to use. It comes with 1/4inch-20 thread screw on the other end through which you can mount additional accessory such as an magic arm, monitor, flashlight, etc. This combination piece is well made of aluminum alloy, it's very easy to set up and solid to use. Color: Black Material: Aluminum Alloy Package Contents: 1 * Light Stand Head Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.