Features: brand new and high quality The wrench size is engraved on each handle for easy identification, high strength and no rust. This hex screwdriver tool kit is the nice choice for advanced RC player. Good repair tool for repairing, suit for RC crawler car boat drone quadcopter model cell phone repair tool. The drive for head is made of high-speed steel, resistant to stripping breaking, rust-free and durable, which is not easy to damage and designed for long-lasting performance. Comes with a bag,easy to carry,multi-pocket design,convenient to use, organize, and carry the tools. Suitable for car , rc boat, rc helicopter, rc quadcopter, multi-axis FPV racing drone and etc. Specifications: Material: Aluminum High Speed Steel Length: 17cm/6.69inches Note: Due to manual measurement, there may be an error of 0-1cm. Package includes: 16 Pieces in a Set