Quick Release Plate For Benro B0 B1 B2 J1 N1 Tripod Ballhead Arca Swiss DC377 The PU-50 quick release plate for Benro New generation B-1, J1 Ballhead. Safe Screw installed in both side to prevent drop of camera by accident. You can change the location of the screw to fit different cameras. The PU-50 Universal Quick Release System has been designed to be compatible with other brand quick release systems. Suitable for most ball heads.