Features: Material: Racquet Starting Clamp is made of aluminum, sturdy, of good quality. Wide head design: 3 springs, large clamping force, this tool can hold the racquet line well. Convenient to Carry: This tennis clamp is compact and lightweight, saving space, flexible to carry outside. Easy to Gras: Tennis starting clamp With its wide head design and ergonomic construction, this clamp is incredibly easy to grasp and handle. Wide Application: The starting clamp is a tool often used in threading work, ideal for all stringing sports, such as tennis, badmintons,etc. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Material: aluminum alloy Size: As picture show