T-HOOK: This amazing tool helps you get the springs under the trampoline easily and quickly when setting up your jumping mat REPLACEMENT SPRING TENSIONER: Tool for tensioning springs of all lengths, universal use in all areas, gardening, camping, mechanics HAND TOOL: Plastic handle and strong metal rod. T-HOOK PULLING TOOL: Spare spring tensioner for garden trampoline mounting. SUITABLE FOR ALL TYPES OF SPRINGS AND TRAMPOLINES: This accessory is very useful for safely tensioning and relaxing the springs of the jumping mat. Do not strain to hook the springs onto the trampoline frame This amazing Upper Bounce Tool also known as the T-Hook, will help you easily pull the springs on the trampoline frame for mounting the jumping mat.