Features Compatible with the MG63 Tripod, Standard 1/4"-20 Threaded Screw, Magnesium Alloy Construction, Spare or Replacement Plate. The MG63QR Quick Release Plate from Smith Victor is compatible with the MG63 Tripod-Monopod Kit. The magnesium plate measures 1.75 x 1.75 and it has a standard 1/4-20 screw which will fit cameras with the same thread. This plate can be a replacement or serve as an extra plate for when you're shooting with an additional body.