The ACT camera Baseplate is an Arca-Swiss compatible camera baseplate. It is designed to work with all cameras. It has a built-in curved gel shoulder pad and 15mm lightweight spaced quick-release rod ports both front and back for matte boxes, follow focus, lens supports, and other accessories. The top (camera plate) and bottom (tripod mount) of the baseplate are Arca-Swiss compatible for easy transitions between shooting styles. The bottom of the ACT Baseplate also has ¼ 20 and ⅜ 16 screw holes for direct connection to tripod quick release plates. The red sliding top camera plate offers easy sliding adjustability for different lens options to get your rig balanced properly for shoulder mount shooting. .