Extech pq1000 and pq500 test leads sets extech pq500 the extech pq500 test leads set consists of two coloured instrument safety leads with single plugs with interchangeable probe tips which allows them to be configured for almost any situation ideal as a replacement or additional test lead set for power meters for voltage measurement equipment compatible with the extech pq3300 and pq3400 meters cable length 3 m supplied with 2 x 3m safety leads 2 x pin probes 2 x alligator clips and 2