NEO precision screwdriver set includes handle and 16 double sided 30 mm driver bits (flat, cross, Torx and hexagonal). Screwdriver magnetic blades are made of exceptionally durable chromium molybdenum steel. Rotary socket in handle allows for precise screw tightening. Two material handle is resistant to chemicals, oils and greases. All comes in handy case. TÜV Rheinland certificate guarantees high quality and reliability of the product. NEO brand meets expectations of professionals.