Nut sert tool - with four quick change mandrels (M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1.0).Accessories - nose piece wrench.Nut serts - M3 x 20 pieces, M4 x 20 pieces,M5 x 20 pieces, M6 x 15 pieces.Forged steel upper handle.Quick change feature.Lockable.Spare parts set available (HN02RK).PVC grip for comfort and to enable more pressure.Threaded mandrel of high grade alloy steel.The Teng Tools concept is based on each tool having its own place. Each TT set acts as a part in an organised system by being clicked together with other TT sets and fits perfectly in your service case, tool box or roller cabinet. No space is wasted and each tool sits perfectly in place. This means it is much easier to see whether any tools are missing at the end of the day. 5 Steps to Get Organized . Choose storage: case/top box, middle box or roller cabinet.Choose the TT- sets you would like..Take off the lid.Click the sets together.Place them in the storage!. )