Set of 2 Replacement Quick Release Plate for the Sirui Tripod Kits with C-10, C-10X, E-10, E-20 Ball Heads and For 3T-35 Series Table Top Tripod Kits Precision crafted makes changing cameras fast & easy Allows for perfect balance of most camcorders Grooved rubber pad provides traction Engraved scale to help identify the optimal positions Protects camera base