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Winmau Whizlock Silver Shaft Caps x 3 The Whizlock concept is very simple and extremely effective – locks your Flights in place and increases the life of your nylon shafts.?World?s best flight locking mechanism?At only 0.1 grams performs better than any shaft ring.?Reduced deflections and increased scoring, as more of your darts will hit the target.?Increased shaft protection and life.?Can be fitted to any flight you punch.?Reduces dart-on-dart bounceouts by more than 50%.?Shafts last thousands of throws more.