Bed of nails
These devices contain an array of small, spring-loaded pogo pins. Each pogo pin makes contact with one testing point in the circuit of the DUT (device under test). By pressing the DUT down against the bed of nails, reliable contact can be quickly and simultaneously made with hundreds or even thousands of individual test points within the circuit of the DUT. The hold-down force may be provided manually or by means of a vacuum to push the DUT downwards onto the nails.