DerBlue Golf Club Groove Sharpener Tool with 6 Heads,Golf Club Grooving Sharpening Cleaner Cleans Both V and U Shaped Iron Grooves Aircraft Aluminum Body, Hardened Tool Steel Tip, knurled handle for better grip 6 cutter heads with two different cutting types,3 for U type club grooves and 3 for V type grooves. weight:0.07 pounds, length of only 4.3 inches Sharpens all U, V grooves.Ensure you're getting maximum backspin, accuracy and distance with clean golf clubs Now you can get an instant improvement in your golf game with exceptionally well golf grooved irons.