The present invention provides a device for skin testing. The device includes a handle assembly connected to a cylinder assembly having two mutually parallel and spaced apart cylinder housings. Each cylinder housing connects to at least one testing head assembly that includes a plurality of pins having a plurality of tips positionable against the skin. Each head assembly has a collar and cooperating tip structured to pivot the testing head on two axes only and still apply even pressure to the pins. Each testing head readily inserts into the collar for usage and ejects promptly from the handle using a trigger mechanism. The cylinder housing construction minimizes accumulation of detritus therein.