Opening feature permits easy insertion of rope without reeving. Bolt for opening feature is retained, to ensure no lost bolts. All sizes feature sheave grooves suited for a range of wireline diameters. Meets or exceeds all requirements of ASME B30.26. Importantly, these blocks meet other critical performance requirements including fatigue life and material traceability, not addressed by ASME B30.26. Crosby's Engineered Solutions Group is ready to discuss your requirements and help select or develop the ideal block for your application. Visit thecrosbygroup.com/engineeredsolutions for more information.