Lines that are cut, pressed or cast into the golf clubface. Grooves appear on woods, hybrids and irons and are designed to impart backspin by grabbing the surface of the golf ball on contact.

Golf’s rules specify the maximum width (0.035”), depth (0.020”) and spacing (varies with width and depth) of grooves in order to limit the amount of spin clubs can produce, especially from long and/or wet grass. Grooves may be any shape as long as they conform to the above requirements. For example, viewed on a cross-section, some grooves form a V, while others are U-shaped.