The 15mm LWS Lens Support also allows for 18mm of vertical travel to give you more flexibility in your setup.
Your 15mm LWS Lens Support System is built from hard anodised aluminium, stainless and hardened steel to ensure maximum durability.
The clamping system allows the use of a single quick release lever to effortlessly lock it in place, even in cramped spaces while being easy to operate with gloves.
The 15mm LWS Lens Support also features two 3/8_ mounting points along with anti‐twist ports.
(From the Manufacturer’s Website)