The KEW8017 with Probes Tips KEW3021, KEW3021A, KEW3022, KEW3022A, KEW3023, KEW3023A are manufactured by Kyoritsu, a renowned Japanese electronic part manufacturer. The product is an insulation tester consisting of a battery-operated, hand-held case with insulated probe tips. The KEW8017 is used for testing continuity, insulation, and the presence of active current in high-voltage electrical equipment, building wiring, and other electrical components. It features auto discharge of the circuit under test, overload protection, automatic power-on and off, and adjustable contact pressure technology. It also features a large LCD backlit display which allows for data to be read conveniently. The product is designed and tested to meet or exceed current standards of safety, and is compliant with ISO standards for insulation testing.