Schaefer Double Block w/ Upset Shackle Lewmar 72mm Synchro Blocks C/C: Fasteners: 1 1/2" (38

C/C: Fasteners: 1 1/2" (38 mm) #10 FH

For reliability and a long service life

Aluminum sheave runs on nomex(tm)/Teflon(tm) bearing ensuring smooth operation and high safe working load

C - 4 19/32 in

It connects directly to the head of the block rather than to an intermediate head post

Schaefer Double Block w/ Upset Shackle Lewmar 72mm Synchro Blocks C/C: Fasteners: 1 1/2" (38Product Description Schaefer Double Block w Upset Shackle Double block features upset shackle for attaching to bails or padeyes. For Boats to 20' or control lines on boats to 25'. Specifications: Sheave Dia.: 1 1 16 in. (27 mm) Sheave Width: 3 8 in. (9 mm) Pin Dia.: 3 16 in. (5 mm) Thickness: 1 1 8 in. (28 mm) Width: 1 3 16 in. (30 mm) Length: 3 9 32 in. (83 mm) SWL: 900 lbs. (410 kg) Weight: 3 oz. (85 g) Max Line: 5 16 in. (8 mm)