Premium 7-bearing system with stainless steel double shielded bearings and. Zero Reverse® one-way clutch bearing. ZRXtra system Zero Reverse with a backup multi-stop gear. Externally adjustable Multi-Setting Brake (MSB) dual cast control system utilizes. both an external click-dial for setting the magnetic brake, plus 4 individually. disengaging, disc-mounted internal brake shoes that operate centrifugally. Braid-ready, forged, double anodized, deep capacity spool.