SmallRig 2991 Battery Plate with V-Mount Adjustable Arm Comes with a double 15 mm rod clamp with adjustable arm to help attach the plate to the 15 mm LWS rod system and adjust the position of the V-mount battery as needed with a variety of mounting methods.The plate itself has several 1/4-20" recesses, M3 recesses, M4 recesses, 1/4-20" threaded holes, M4 threaded holes and an ARRI 3/8" -16 threaded hole to which you can attach a twin screw clamp, magic wand or other accessories.Two dowels prevent the battery from rotating during attachment.The plate is also compatible with the Blackmagic URSA mini. Note: 1. The plate does not come with a V-Lock part (male).2. This is purely a mounting solution for a V-mount battery.The plate has no power ports. Compatibility: The plate will fit most V-mount batteries, but will fit the PAGlink series V-mount batteries and the Patona Premium Battery for BP-190WS. 1 x V-battery mounting plate1 x Double 15 mm rod clamp with adjustable shaft3 x Allen key2 x 1/4-20" screw (short)2 x 1/4-20" screw (long)4 x M4 screw4 x M3 screw4 x M3 screw.