To use the Abaco Dual Forklift Boom, first make sure your forklift is a standard one and you have a compatible slab lifter. Attach the boom to the forklift according to the manufacturer's instructions. When lifting marble or granite slabs from closed - top containers, position the boom carefully to ensure a secure grip on the slabs. Be aware that this is a special - order item with a 12 - week lead time, and all sales are final. For maintenance, regularly check the boom for any signs of wear or damage, like cracks or loose parts. Keep it clean and lubricate moving parts as needed. If you notice any issues, stop using it immediately and contact a professional for inspection and repair.