6" McKissick 419 Snatch Block with Shackle Fitting, Single Sheave, 8 ton capacity, BBOpening feature permits easy insertion of rope without reeving, or while the block is suspended. Bolt for opening feature is retained, to ensure no lost bolts. Forged steel swivel tees, yokes and shackles. Can be furnished with bronze bushings or roller bearings. Center pin equipped with pressure lube fitting. All sizes feature sheave grooves suited for a range of wireline diameters. Meets or exceeds all requirements of ASME B30. 26. Importantly,