Parts List: 30 x Wrenches 1 x Storage box Highlight description: 1.Allen wrench is a tool with a hexagonal cross section, used to drive bolts and screws with an inner hexagon socket on the head 2.This tool is simple, small and light. Either end of the tool can be used to stretch to gain advantage or gain torque 3.There are many different sizes, if you use a hexagonal wrench on an oversized sleeve, it may damage the fastener or the tool itself 4.This set includes a series of quality precision hexagon keys in standard arm metric and long arm imperial. 5.Coated and hardened chrome vanadium steel enables reliable work without bending, and the length provides more leverage. The surface of the Allen wrench is phosphated to prevent rust 6.Due to its versatility, it can be used for various tasks in mechanical work, such as in workshops and production facilities, or in your own home, such as bicycle repair. Detailed description: Material: high carbon steel Dimensions: 18.2 x 12.5 x 3.2 cm (L x W x H) 30-piece set content: Mm: 0.7; 0.9; 1.27; 1.5; 2.0; 2.5; 3.0; 4.0; 4.5; 5.0; 5.5; 6.0; 7.0; 8.0; 10.0 mm Inches: 0.028; 0.036; 0.05; 1/16; 5/64; 3/32; 7/64; 1/8; 9/64; 5/32; 3/16; 7/32; 1/4; 5/ 16 and 3/8 inches Notes: 1.Due to the difference between different monitors, the picture may not reflect the actual color of the item. 2.Please allow slight dimension difference due to different manual measurement. Thank you for your understanding. 1.Allen wrench is a tool with a hexagonal cross section, used to drive bolts and screws with an inner hexagon socket on the head 2.This tool is simple, small and light. Either end of the tool can be used to stretch to gain advantage or gain torque 3.There are many different sizes, if you use a hexagonal wrench on an oversized sleeve, it may damage the fastener or the tool itself 4.This set includes a series of quality precision hexagon keys in standard arm metric and long arm imperial. 5.Coated and hardened chrome vanadium steel enables reliable work without bending, and the length provides more leverage. The surface of the Allen wrench is phosphated to prevent rust