Catalog > Electro-Mechanical Components > Switches > Switch Accessories Anti Two Block Switch Anti Two Block Switch A2B SWITCH Hirschmann Anti Two Block Switch For Crane Main Booms - 12ft. Cable 10,767.87 ZAR inc for 1 Each 0 in Stock Add Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Approved as an emergency limit switch by the Trade Cooperative Institute for Work Safety (BIA) High quality diecast housing, additional surface coating Fully cast electrical function unit Integrated line monitoring Stainless steel traction rope with a tensile strength of ≥5kN Funnel-shaped introduction of the actuating rope with low friction surface for safe rope guidance