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WARNING! Using a loop in a choker style weakens the loop  

connection. Do not use choker style connection.

WARNING! Attaching line to or through block head will  

considerably weaken block, and it can break under low load. 

Attach primary support loop/lashing only through mouth of sheave.

Attach Block

1. Wrap small line around both 

sides of primary support loop/

lashing by passing through the 

secondary lashing tunnel. Use a 

secure knot such as a Carrick bend 

to hold the primary support loop/

lashing against the cheeks. See 

www.harken.com/knots.

WARNING! If secondary lashing at head comes loose, block can 

flip and cause line to jam, resulting in loss of control. Inspect 

lashing often and redo if necessary. 

Make sure secondary 

lashing at head is secure 

so block stays aligned. 

Secondary Lashing to Head

V blocks can be set up as becket or fiddle blocks. Attach becket or secondary 

block to anchor point. Lash to head and mouth as shown.

WARNING! Attaching becket or secondary block to primary  

block will weaken block, and it can break under load. Attach  

to anchor point.

Use as Becket/Fiddle Block

Anchor Point Chafing or Cutting

Loops must attach to round bails such as those found on padeyes  

or pins. Sharp edges on many perforated toe rails will cut loop, severely 

weakening it. When loop is attached to a plate, it must be at least 6 mm 

(

1

/

4

") thick and have rounded edges to keep loop from being damaged.

Sharp edges will  

damage loop.

Round edges to prevent 

damage to loop.

WARNING! Loops or lashings running over a sharp edge can cause 

part to break under load. Attach to fitting with a rounded edge.

Anchor point

Anchor point

Mouth

2. Shorten the secondary lashing 

ends and tuck them into the tunnel.

Slip primary support lashing or loop through mouth to make four (4) 

holding strands.

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