The Upper Bounce® Heavy-Duty Trampoline Spring-Pull Tool makes it easy to install a jumping mat on your trampoline. This trampoline T-hook gives you leverage to pull springs into the slots on your trampoline frame. Mfrs. 90-day limited warranty. Imported. Manufacturer model #: UBHWD-TH. Makes installing a jumping mat easy. Heavy-duty construction. Gives you leverage for pulling springs onto the frame. Item(s) will ship directly from the manufacturer; delivery options and/or shipping upgrades are unavailable. Please allow 3-5 weeks for delivery. Contiguous 48 states only. A street address is required for delivery.