Made of premium alloy steel, the screwdriver bits are durable and long lasting use. With good workmanship, high precision, it is practical in use. Titanium coated surface, not easy to rust, more durable, long service life. It is useful to operate electronic device, perfect for electrician, mechanic and repair work. Feature - Color: As shown. - Material: vanadium alloy steel and titanium. - Size: About 5 x 0.8 x 0.8cm. - Made of premium alloy steel with titanium coating, the screwdriver bits are durable and long lasting use. - Good workmanship, high precision, practical in use. - Titanium coated surface, not easy to rust, more durable, long service life. - It is useful to operate electronic device, perfect for electrician, mechanic and repair work.