57mm Carbo Air® Fiddle Ratchet Block

Harken 57mm Carbo Air® Fiddle Ratchet Block is a good choice for 3:1 and 4:1 tackles on dinghy vangs and mainsheets.

Carbo Ratchets blocks allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. Lightweight Carbo Ratchets are available in 40mm, 57mm and 75mm sizes. All the Carbo Ratchets feature a recessed On-Off switch that is easily operated from either side. The 40mm cam-arm versions work in ratchet mode only. Commonly 57mm blocks are for jibsheets and spinnakers on medium dinghies.  

The 40mm, 57mm and 75mm Carbo Ratchamatic® is adjustable for many applications and weather conditions. The load-sensing ratchet block rolls freely in both directions under low loads, then engages the ratchet automatically as loads increase. With 180 degree wrap, you get a 10:1 holding power. 

Key Features

• Hand-hold your loaded lines
• Use for spinnaker sheet systems on dinghies, sportsboats, and medium keelboats
• Ratchet fiddle blocks are hand and crew savers
• Allows a line to be eased instantly with control 
• On/Off switch allows the ratchet to be turned off in light air 
• Hardkote-anodized aluminum sheaves
• Stainless steel swivel shackle
• Sheave Diameter: 2 1/4″ (57 mm)
• Max. Line Diameter: 3/8″ (10 mm) 
• Max. Working Load (MWL): 792 lb. (359 kg)   
• Breaking Load: 2380 lb. (1080 kg)
• Weight: 4 oz. (113 g)
• Length: 4 5/8″ (118 mm)