It doesn"t get any easier than the Bracket System. This patent pending design is the strongest, safest, easiest system to install on the market today. You simply slide the wood into the brackets and bolt. You don"t even have to cut or measures. This is the perfect solution to kid"s swings, porch swings, even tire swings. Each bracket has a baked-on green enamel paint for rust-prevention, and pre-drilled holes to make things easier on you. These brackets are designed for two 4x4 legs and one 4x6 swing beam. Hardware is not included and we recommend twelve 5/16 x 3-inch lag bolts with washers. Please note: When using two pieces of 2x6 for the swing beam, there will be a gap in the bracket. You will need to fill the gap with a small piece of .5-inch material before lag bolting. About Eastern Jungle Gym Inc. Eastern Jungle Gym was founded over 16 years ago by a family intent on building a strong, safe, and fun jungle gym that would last for years and could be installed almost anywhere. Since the creation of their very first jungle gym in a small shop behind the family home, Eastern Jungle Gym has become one of the industry leaders in the backyard playset market. Their products are synonymous with quality, strength, and value, and are available in many configurations to suit your family"s swing set needs. A proud member of IPEMA (International Play Equipment Manufacturers Association), Eastern Jungle Gym voluntarily complies with the CPSC (Consumer Product Safety Commission) and ASTM (American Society of Testing Materials) guidelines for playground safety. * Heavy-duty A-frame solid steel brackets * For use with kid"s swings, porch swings, tire swing * Safest, easiest design to install on the market today * Just slide wood in and bolt * No cutting or measuring required * Features baked-on enamel paint for durability * Holes are conveniently pre-drilled * Designed for 2 4x4 legs and 1 4x6 swing beam * Twelve 5/16 x 3-inch lag bolts and washers recommended * Hardware is not included