Lanxri 360 Degree Rotating 15mm Rail Blocks Clamp for DSLR Camera Rod Supporting System Product Feature Standard 15mm dual-port railblock clamp, knobs to lock Rotate 360 degree to adjust the position, locked by knob Fits camera's 15mm rod supporting system Mounts via the unthreaded 1/4''-20 holes Material: aluminum alloy Product Description It features standard 15mm double-rod holder clamp and secures the rods in place by two lock knob on either end, it's universally applied to set up double 15mm rod support system, so that you can add accessories to support camera lens, flash light, EVF, monitor, etc. The integrated central rail block allows you to rotate 360 degree and get it secured at a position you need. it is adjustable and flexible enought to adapt itself to your photographic practice. Net Weight: 115.3 g You Get: 1 x 360 Degree Rotating 15mm Rail Blocks Clamp 2 x 1/4''-20 Thread Screw 1 x Allen Wrench Before you place an order, please provide me with English information to facilitate our delivery and logistics