An expert set made of excellent CrV50BV30 chrome vanadium steel. Practical screwdriver bits TORX, HEX, POZIDRIV, cross and level were made of AISI S2 hardened steel. A reasonable screwdriver with the capacity to adjust work bearings and a joint that takes into consideration three-step change of the device tendency concerning the fastener. Ergonomic and elastic handle made of strong plastic, gives a solid hold and forestalls slipping of the hand. intended for use in services, it can be used to loosen and tighten screws in hard-to-reach places.