Specification: Dual-purpose electronic Screwdriver tester pen (it can be a single word or a cross) Material: PC plastic + chrome carbon steel Color: As the picture shows. Size: Total 139mm, handle length:85mm Package: 2x Tester Pens Feature: -Using PC plastic body, high strength, not easy to break -Chrome-plated carbon steel knife shaft, sturdy and durable -Long-lasting neon tube, long lifeHow To Use When the electric pen is tested for electricity, when the hand touches the cover on the top of the handle, and the electric pen is inserted into the live wire socket, the neon bulb of the electric pen lights up, indicating that the socket is live.(Neutral line) socket, the neon bulb will not light up Notices: 1 to manual measurement, there may be a slight error in size 2 to the light of the picture and the display of the screen, the color of the picture may be slightly different from the actual object. 3 guarantee your 100% satisfaction! If within 90 days you are not 100% satisfied return your product for a full refund!