79
947
339
237
A
B
285
A
433
© US Sailing Team / Sailing Energy
394
B
A
062
*#10 (5 mm) FH fasteners.     **#10 (5 mm) RH fasteners.     ‡#8 (4 mm) RH fasteners, max line Ø 6 mm (1/4").
Accessories
Accessories are designed to make standard blocks more 
versatile or fill a special need. Custom products avail-
able on website. 
Handhold
The 062 handhold is popular on boats like Solings and 
scows to help hiking crew reenter the boat. It can also 
be used as a handle for things like engine covers. It has 
drain holes.
Bullseye Fairlead
Use the 237 and 339 where there is little deflection 
in the line such as routing a spinnaker pole foreguy aft 
along the cabin house.
Sail Chafe Protectors
Use the 285 to ease genoas over lifelines or past shrouds and 
to help large roach mainsails clear backstays.
Prefeeder
Use 947 with racing foils or furling systems.
Dinghy Clew Hook
The 433 and 394 dinghy clew hooks are designed for 
Lasers and other loose-footed dinghies. They install per-
manently on the boom and allow you to instantly attach 
and adjust your sail in high wind and waves.
Part
No.
Description
A
B
Fastener spacing
in
mm
in
mm
in
mm
 062 
 Handhold* 
 5 3/4 
 146 
 3 1/2 
 89 
 
 
 237 
 Bullseye fairlead** 
 1 1/4 
 32 
 1 1/2 
 38 
 1 
 25.4 
 285 
 Sail chafe protector set (2) 
 2 3/4 
 70 
 
 
 
 
 339 
 Micro bullseye fairlead‡ 
 1 1/16 
 27 
 3/4 
 19 
 .71 
 18 
Part
No.
Description
Weight
oz
g
 394 
 Dinghy clew hook/404 
 1 
 28.4 
 433 
 Dinghy clew hook 
 .65 
 18.4 
 947 
 Prefeeder 
 1 
 28 

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