External Comb Type Shorting Link External shorting links bridge potentials between terminal blocks, reducing wiring time. Adjacent or selected blocks within an assembly can be easily interconnected. Individual links may be removed for selective shorting. These are insulated and available in 2, 3, 4 and 10-pole versions. They are made of tin plated brass/copper. Comb Link must be tightened to the recommended torque specified to get a reliable connection.