SmallRig 3652 Dual Rod Support It comes with an anti-twist design and one 1/4"-20 screw to fix matte box to a rail support system.It is 20.4mm vertically adjustable, compatible with Φ52/Φ55/Φ58/Φ62/Φ67/Φ72/Φ77/Φ80/Φ82/Φ85/Φ86/Φ95mm DSLR or cine lens. Its bottom features a horizontal support that prevents tilts. Compatibility: 1: Dual Φ15mm rod 2: Compatible with Star-Trail (95mm) and Revo-Arcane (114mm) series matte box 3: Compatible with mini matte box (3196 & 3680) Package Includes: 1 x 15mm LWS Support 1 x Allen Wrench