Wish you could gauge distance better to park your car in just the right spot? The MAXSA Innovations 37340 Park Right BallPark Parking Ball helps you park your car in the right place every time. It's the “tennis ball on a string” meets the 21st Century! The BallPark helps you prevent damage both to your car and your garage. Simply screw the included eye hook into the ceiling above where you want your windshield to be when parked. Then adjust the string so the BallPark hangs at a height where it will touch your windshield when you pull in. The ball creates a light show when it touches your windshield, letting you know you’re in the right spot! Get 1 for every garage or carport space!