Use Harken Black Magic footblocks to redirect lines on the deck. Footblocks with lockoffs temporarily secure sheets.

Either metric or imperial flathead fasteners may be used for mounting and are not exposed.

Sideplates and sheaves Hard Lube-anodized for maximum UV protection and a smooth surface. Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.

Sheave Ø (mm)
75 mm

Sheave Ø (in)
2 15/16 in

Length (mm)
111 mm

Length (in)
4 3/8 in

Height (mm)
57 mm

Height (in)
2 1/4 in

Weight (g)
574 g

Weight (oz)
20.24 oz

Maximum line Ø (mm)
14 mm

Maximum line Ø (in)
9/16 in

Maximum working load (kg)
1572 kg

Maximum working load (lb)
3465 lb

Breaking load (kg)
3143 kg

Breaking load (lb)
6930 lb

Number of fasteners

Fasteners (mm)
8 FH mm

Fasteners (in)
5/16 FH in

A (mm)
11.5 mm

A (in)
15/32 in

B (mm)
28.5 mm

B (in)
1 1/8 in

C (mm)
70.5 mm

C (in)
2 3/4 in

D (mm)
21 mm

D (in)
13/16 in

E (mm)
76 mm

E (in)
3 in

F (mm)
110 mm

F (in)
4 5/16 in

G (mm)
17 mm

G (in)
21/32 in