T-HOOK: This tool helps you install springs onto the trampoline frame easily and quickly when setting up your jumping mat. Trampoline spring pull hook, constructed from durable steel and hard plastic. This spring pull tool, also known as a T-Hook, assists in attaching springs to the trampoline frame during mat installation. Use this tool to help stretch and secure trampoline springs. Makes installation faster and easier! Color: Black Material: Plastic + Iron Size: 13 cm Package Contents: 1 x Trampoline Spring Pull Tool Note: Other items are not included. Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.