Features:* Made of high quality 45# steel material, durable and sturdy, high strength and high strength, long life and high quality, easy to install and use.* Organized in a compact carrying case, easy to transport and store, clean and organized.* Simple repair tools for repairing and maintaining electronic, electrical and mechanical devices.* Great for automotive applications, electronic, electrical outdoor, professional and domestic and so on.* This hex bolt parts set, including 3 pcs. Tri-wing bits, 3 pcs. Four-leaf bits, 4 pcs. Key bits, 10 pcs. Torx bits, 12 pcs. Hexagonal bits, 1 pcs. Connecting rod, very multifunctional and practical. Specifications:Product Name: Screwdriver SetMaterial: 45# SteelColor: Blue (Hollow), Red (Solid)Optional Type: Blank, SolidBox Size: (Approx.) 65*47*29mm Suitable for: Electronic, Electrical and Mechanical Repair and Maintenance Quantity: 33pcs/set Package Contents:33pcs/set Screwdriver Set Note:1. Transition: 1cm=10mm=0.39 inch.2. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.3. Please allow slight manual measurement deviation for the data.