Strong Magnet: With super strong built-in magnet, the golf hat clip holds the ball marker tightly without falling off. Always keep it in place even if turning it upside down. Fit Most Ball Markers: Diameter: 1" for the disc and 0.4" for the magnet. Standard size for most golf ball markers. Easy to be carried around with no extra burden or bulk. Easy to Clip: The small ball marker holder can be easily clipped onto the rims of your hats, gloves, pants, bags or belts. Useful golf tool for quick obtainment of ball marker on court. Reliable Material: Made of nickel-plated alloy, the golf hat clip is durable and corrosion-resistant. Patterned surface can effectively prevent it from slipping off your hand.