The Eyeline Putting Alignment Mirror is the perfect way to get ready to play. Toss it down, line it up, check your setup lines, and build confidence. Check your putter face alignment, eye position and throw it back in your bag. It has putter gate slots to assure sweet-spot contact. Head to the 1st tee hunting for birdies. Poor alignment is the major cause of missed putts. Using the Eyeline Alignment Mirror will create confidence on the green. It measures 12\" x 6\" and comes with a black carry bag. The Putter Gate Slots let you set up a gate of tees for the toe and heel of the putter to learn to swing and create \"sweet spot\" contact in the center of the putter face.