... " adjustment,bolt-on swivel bracket,trailer jack,zinc coated with dual poly 6" caster. This jacks provide a 1,500lbs.capacity ... solid bolt and nuts.fit up 3"x5" trailer frame.dual 6" poly wheel keeps trailer more stable when towing.clear ... )bracket height: 12.50"retracted height: 25.25"leg type: dual 6" poly wheel (avoid wear and tear)being sold c ...