HARKEN 57MM BLACK MAGIC DOUBLE SWIVEL LO LOAD
The entire line of Black Magic Air blocks 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. Low-load blocks use Torlon® rollers and 316 stainless steel shackles. Standard blocks have 17-4PH stainless headposts.
Like all Black Magic blocks, 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)
132 mm
Length (in)
5 3/16 in
Weight (g)
342 g
Weight (oz)
12.05 oz
Shackle pin Ø (mm)
8 mm
Shackle pin Ø (in)
5/16 in
Maximum line Ø (mm)
12 mm
Maximum line Ø (in)
7/16 in
Maximum working load (kg)
1250 kg
Maximum working load (lb)
2755 lb
Breaking load (kg)
2500 kg
Breaking load (lb)
5510 lb