High quality material: Made of high quality stainless steel and titanium which is precision cut and molded for an extremely strong hex socket head that is resistant to stripping and breaking. The handle is made of high quality aluminum with a non-slip outer layer for supreme grip. Thanks to these high-end professional tools, you will feel like a real Formula 1 mechanic. The set includes: 4 professional hexagon socket screwdrivers in 4 different sizes. The aluminum handle with soft non-slip surface has a length of: 90 mm/3.5 inch and a diameter of: 18mm. Total length : 175mm 1x1.5mm, 1x2mm, 1x2.5mm, 1x3mm. Each handle is marked with a clear size inscription for easy identification and use. Multifunctional use: Can be used in a wide variety of uses. Mainly used in professional RC racing world for disassembling and reassembling model DJI drones, RC helicopter, RC quadcopter, RC cars, RC boat, Multi-axis FPV racing drone, robot, etc. The winner on a Track is often the one with the best equipment. It is not by saving on your tools that you will become a winner. Quantity delivered: 1 set lucky meet Note: The data is all measured manually, please allow 1-3cm error, due to the light and display difference, there will be some color difference, the actual object received shall prevail.