An excellent tethering alternative if ground-stakes are not possible, such as in soft or sandy ground. The 50" Skyline Trolley comes with all the hardware and parts you need for a complete system including a down line, die-cast pulley and screw hooks. The direct-connect, clasp design is stronger and more reliable than traditional clasps. The double-swivel feature reduces the chances of the cable tangling. The trolley is easy to assemble and install. Recommended for dogs up to 60 pounds.