This screwdriver is manufactured with a chrome vanadium steel blade which is hardened, tempered & chemically blackened. It has a fully insulated handle & blade sheath for total safety when working. It is tested to 1kV & are suitable for working on live circuits of 1kV AC & 1.5kV DC. Dimensions: Length: 1cm Width: 4mm With a dedicated Customer Service Team committed to providing peace of mind from our door to yours., Weight: 0.11904962148 pounds, Manufacturer: Pro User