Single 40 mm pulley with spring and trigger guard, ball bearings. - - Single With Swivel Plate And Spring SKU Title breaking load kg fixing hole centres mm length mm maximum line diameter mm maximum working load kg shackle pin mm weight g A2040 - 4222ASS Single With Swivel Plate And Spring 800 - 78 10 180 - 69 SINGLE WITH SWIVEL PLATE AND SPRING A2040 - 4222ASS Technical documents can be downloaded here