This high strength dog anchoring system was designed for aircraft, so when your Chessy goes Boeing and takes off after that rabbit in the next yard, the three spikes will pull toward each other, fixing it tighter into the ground. Bright visibility, but low profile to prevent tire punctures. 3/8” diameter spikes go 10” into the ground. Holds 1200 lbs. per claw. Powder-coated aluminum legs.