Suitable for high frequency circuit adjustment. Fit for various inductance, semi variable capacitor, half electric resistance and big brand SMD parts Strong hardness, not easy to wear, good workmanship No electromagnetic induction, electrically and thermally insulated. Non-magnetic, non-static 8pcs a set, 8 different bits for your convenient use Our product is adopted precision zirconia ceramics bits, good quality and, Weight: 0.1984160358 Pounds, Manufacturer: Sharainn