The ONEstep wheel chock is the fast and easy way to chock your trailer! You can set and remove the chock in seconds. Little or no bending over to set and remove. Simply hold the cable handle and slide it between the tires with your foot. Then step down on the scissor arms to firmly lock your trailer in place. When you're ready to remove it, just pull up on the cable and the chock slides right out. Zinc plated wedges and durable powder coat finish keep it looking great for years. Adjusts from 16" to 24" to fit most tandem axle trailers. Great for travel trailers, 5th wheels, boats, cargo and horse trailers.