Metal Linemen Tester Screwdriver we bring forth is utilized for tightening and loosing screws on varied devices, machines, instruments and equipment. It has myriad usage in home, automotive, garage, shop, personal watercraft, boats, snowmobiles, etc. Also, it can be used for directly testing AC voltage of varied electrical and electronic instruments and devices. It is made up of transparent plastic tube, metal stem with PVC sleeve, and voltage showing light bulb with advanced electrical technology. Additionally, Metal Linemen Tester Screwdriver is shock proof, lightweight, easy to use, maintenance free and affordable.