Harken 57mm HL Block 3215

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. 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 mm
Sheave Ø (in) 2 1/4 in
Length (mm) 119 mm
Length (in) 4 11/16 in
Weight (g) 152 g
Weight (oz) 5.36 oz
Shackle pin Ø (mm) 6 mm
Shackle pin Ø (in) 1/4 in
Maximum line Ø (mm) 12 mm
Maximum line Ø (in) 7/16 in
Maximum working load (kg) 1134 kg
Maximum working load (lb) 2500 lb
Breaking load (kg) 2268 kg
Breaking load (lb) 5000 lb