Use at your own risk and follow all the directions. Use Save and Roll™ wheels on the tennis hopper rods to avoid direct contact of the metal rods with tennis court and other surfaces. Use Save and Roll™ wheels to assist hopper transportation holding hopper by its handle. Do not step, stand or lean on the hopper with Save and Roll™ wheels installed on it. In no event shall ZUBRIC™, Inc be liable for any direct, indirect, incidental, special consequential damages to property or health or life, whatsoever, arising out of or connected with the use or misuse of our products.