Ronstan Main Swivel Jammer Base Shipping_Standard The Ultra-Strap was the first

The Ultra-Strap was the first marine industry block designed to work specifically with a rope attachment

Adjustment 63 mm Backing Plate Length  95 mm Backing Plate Thickness  1

Sheave 29 mm Length  76 mm Weight  35 g Maximum Line  8 mm Maximum Working Load  136 kg  Mounting Hole Spacing  57 mm Cutout  19 x 44 mm Breaking Load  907 kg Fasteners  5 FH mm

instructions

8 D Plus 75-90Kg 20

Ronstan Main Swivel Jammer Base Shipping_Standard The Ultra-Strap was the firstSwivel cleat bases permit easy cleating and releasing from any angle. Height adjustable arm for optimum cleating angle. Twin ball bearing race minimises friction. Adjustable ratchet system prevents the arm from falling to leeward. Twin rows of ball bearings support the cleat arm, and stops are provided to limit rotation to 260. The rotation stop on the cleat arm moulded cleat arm cradle part can be cut off to allow full 360 rotation. Swivel fork has a