This shot sensor for irons allows for measurement of 16 shots. I also use it, and you can hit many balls with one sheet. It's very useful for understanding my swing. This is for 16 shots x 3 sets. Brand new, unused. ・Brand: Tabata ・Product Name: Shot Sensor for Irons ・Quantity: 16 shots per pack ・Application: For irons only ・Right/Left Handed: Right-handed only ・Country of Manufacture: Made in Japan Thank you for viewing. Thank you very much.