DUOSHIDA Groove Sharpener with 6 Heads - Golf Club Groove Sharpener Re-Grooving Tool and Cleaner for All Irons Pitching Sand Lob Gap and Approach Wedges and Utility Clubs (2 Blue)Product description The grooves in your irons are designed to enable ball control and spin.Frequent club use can not only fill the grooves with debris but can also damage ..