Swing Sock attaches easily & securely to any iron or wedge to provide you with an inexpensive, portable, yet highly effective training aid. The added weight is fantastic for stretching muscles before a round to increase your performance & prevent injury. The device allows you to hone the mechanics of your swing without the need for a golf ball, allowing you to practice indoors or out. With practise, Swing Sock allows you to enhance multiple swing skills including power, accuracy, tempo & consistency. This edition of the Swing Sock has a weight of 13oz (370g), & is designed for experienced golfers with a low handicap.