Check the listing for details. 35mm Single Swivel Shackle Block - Master BP-3501F. Condition: Brand New. Listed at 13.29 USD. product specifications35mm Single Swivel Shackle Block - Master BP-3501F Sheave Ø 35 mm Sheave Ø 1 3/8 in Maximum line Ø 8 mm Maximum line Ø 5/16 in MWL / BL 300 / 800 kg MWL / BL 661 / 1763 lb Product range - Plain Bearing BlocksThe Master range of plain bearing style blocks are available in 35mm, 50mm, 60mm, 72mm and 90mm sizes and multiple configurations. The range features:a self-lubricating Acetal bushing and 316L stainless steel shaft for smooth rotation and high static loads, high strength side plates made from a UV stabilised composite of stiff glass-fibre reinforced Nylon for lightness,a locking mechanism so that the shackle in the “single swivel shackle” models can rotate freely or be locked in position (only from 50mm),a becket pin which is easy to remove or lock into the keyhole with no tools,adjustable cam cleat arms for an optimal exit angle of sheets.