Harken 57mm Aluminum Double Block, Swivel

Harken 57mm Aluminum Double Block - Swivel

Description - The entire line of Black Magic® AirBlocks® has been redesigned with a sleek new look. Their unique, performance-packed engineering remains exactly the same. These strong, lightweight blocks feature free-rolling high-load Torlon® roller bearings for a high strength-to weight ratio.

Like all AirBlocks®, the three-way head swivels/locks in front/side positions. Blocks are easily disassembled with a single hex wrench.

Sheave Ø (mm) - 57

Sheave Ø (in) - 2 1/4

Length (mm) - 132

Length (in) - 5 3/16

Weight (g) - 336

Weight (oz) - 11.86

Shackle pin Ø (mm) - 8

Shackle pin Ø (in) - 5/16

Maximum line Ø (mm) - 12

Maximum line Ø (in) - 7/16

Maximum working load (kg) - 1633

Maximum working load (lb) - 3600

Breaking load (kg) - 3267

Breaking load (lb) - 7200