The Notch 3/4″ Rigging Block with 3/4″ Ultra Sling provides a knotless anchoring system for heavy arborist rigging. The 7 foot Tenex Tec Ultra Sling features six spliced pockets for quick length adjustment and has a 21,000 lb minimum breaking strength in a choked configuration. The included Notch rigging block handles running lines up to 3/4 inch and has a 30 kN working load limit.