The Notch 1/2″ Rigging Block is a compact arborist block designed for rigging lines up to 1/2 inch (13 mm). Hot forged aluminum side plates, CNC machined sheaves, and wide bend radii provide smooth rope handling, while the captive screw pin allows secure opening and closure. The block has a 20 kN working load limit and 100 kN minimum breaking strength, with an upper sheave that accepts anchor slings up to 5/8 inch.