Features: Durable: The bit set is made of chrome vanadium steel, which is durable and long using time. 54 in 1: The bit set consists of 54pcs different type of bit, which all are stored in a plastic box. Professional: 26pcs 75mm long batch, 26pcs 30mm short batch head and 2pcs connector can meet your needs in most cases, You could pick the right and suitable bit according the situation. Scope of application: The bit set is suitable for outdoor and home using. The bit set is perfect for engineering, machinery, maintenance of household appliances, electric, pneumatic tools and other production lines. Specifications: Type: Torx Star Tool Kit .