Feature: The product is made of high quality chromium vanadium steel with high hardness and good wear resistance. A variety of sleeves can be selected to meet the needs of different works. Products are mainly used for screw tightening and disassembly in automobile repair, workshop production, hardware manufacturing, etc. Tool box storage: a set of solid plastic tool box for safe storage and portability. Each bit has its size imprinted on the bit itself, making it easy to identify them after you've removed a handful from the case. Specification: Material: Chrome vanadium steel(Cr-V) Weight: 1145g / 40.4oz Package list: 5 * Star shape socket with 1/4 inch female connector(E 4, 5 ,6, 7, 8) 6 * Star shape socket with 3/8 inch female connector(E 10, 12, 14, 16, 18, 20) 5 * Star shape socket with 3/8 inch male connector(T 10,T15,T20,T25,T27) 5 * Star shape socket with 1/2 inch male connector(T30, T40, T45, T50, T55) 7 * 1/4 inch T8, T10, T15, T20, T25, T27, T30 1 * 3/8 inch Socket Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. 1、The product is made of high quality chromium vanadium steel with high hardness and good wear resistance. 2、A variety of sleeves can be selected to meet the needs of different works. 3、Products are mainly used for screw tightening and disassembly in automobile repair, workshop production, hardware manufacturing, etc. 4、Tool box storage: a set of solid plastic tool box for safe storage and portability. 5、Each bit has its size imprinted on the bit itself, making it easy to identify them after you've removed a handful from the case.