uxcell AC 100-500V Voltage Tester Pen Electroprobe Slotted Tip Screwdriver The shafts are protected by a corrosion-resistant chrome plated finish. The non-slip handle and more comfortable operation. Multifunction, used as directly or indirectly test AC voltages, and as a Slotted screwsriver. Voltage Tester is perfect for directly or indirectly testing AC voltages. Suitable for home, shop, garage, automotive, motorcycles, boats, personal watercraft, snowmobiles.