Schaefer Fiddle, Univ Head, Cam, Becket, Ball Bearing Boat Viper 640 or manual) with the Rule

or manual) with the Rule "fail-safe" spring return to "off" from the "manual" position

Track features internal slide bolts

Works with 303-33 for a 4:1 purchase or 303-15 for a 3:1 purchase

Like the i70s instrument

which switches seamlessly from free-running to ratchet mode

Schaefer Fiddle, Univ Head, Cam, Becket, Ball Bearing Boat Viper 640 or manual) with the RuleFiddle block with anodized aluminum cheeks, delrin(tm) ball bearing sheaves, becket and cam cleat. Works with 506 45 for 4: 1 purchase. Delrin(tm) ball bearing sheaves ensure low friction and high safe working load. Fast entry cam cleat allows easy line engagement. Sheave Dia. 1 7 16" (37mm), Thickness 2 5 16" (58mm), Width 3 7 32" (82mm), Length 6 13 32" (163mm), SWL 1500 lbs. (680kg), Weight 11. 6oz (329g), Max Line 7 16" (11mm)