Spinlock SUA Single Manual Mini Jammer 1/4" to 3/8" Popular halyard Jammer, more power than a cam cleat but much smaller than a powerclutch.
Features and Benefits
Rope Range - 6mm - 10mm (1/4" - 3/8")
Load - 200kg - 400kg (440lb - 880lb)
Max SWL - 400kg (880lb)
Weight - 0.2kg (0.44lb) BPM 2402-56