Description: 【Comprehensive】Includes 40 essential pieces: long and short spline bits, hex bits, 12 point metric bits, plus 1/2" and 3/8" socket adapters for versatile automotive and mechanical repairs 【Material】Crafted from premium alloy steel with high hardness and enhanced wear resistance, ensuring reliable performance even under demanding conditions 【Organized】Each Hand Tool has a designated slot in the practical storage case, keeping all components neatly arranged for easy access and inventory control 【Portable】Sturdy case with secure closure makes transportation convenient while protecting tools from damage during travel or storage 【Versatile】Ideal for professional mechanics or DIY enthusiasts; suitable for a wide range of repair tasks involving , hex, and fasteners Specification: Material: Alloy Steel     Size Chart: Box 32cmx14cm/12.60inchx5.51inch Package Includes: 1x Hex Star Spline Socket Bit Set (include 40 pieces) Note: Please allow slightly errors 1-2cm differences due to manual measurement.