【For 15mm Rod Support System】 The 15mm dual rod clamps can firmly attach to any shoulder rig, video rig, and camera cage with the LWS 15mm rail support system 【Suitable for Various Matte Boxes】 Compatible with SmallRig 3196 3680 3556 3641 3645 NEEWER PG002 and other mini matte boxes with a 1/4" thread. The nonslip rubber pad enhances stability 【0.87"/22mm Vertical Adjustment】 0.87"/22mm vertical adjustment accommodates ø85-107mm camera lenses. A flat base allows the support to sit flush on the desk 【Robust Aluminum Alloy Structure】 Made of solid and scratch resistant aluminum alloy, 15 mm support rod clamps are only 2.5oz (70g), portable for outdoor creation 【Simple and Tool Free Installation】 With handy locking knobs, this support can instantly and firmly attach to a matte box or 15mm rods without the requirement for any tool