Hipshots Grip-Lock Guitar Tuning Machines grip your strings for positive, accurate tuning. The new sleek design and ultra smooth 18:1 gear ratio give you a great combination of tuning stability, accuracy and good looks. The locking feature eliminates the need for multiple string wraps, and trem users no longer need a locking nut that deadens string sustain and all those annoying Allen screws and wrenches (added weight). Tired of winding strings? This is the answer. The Hipshot Grip-Lok is proven to hold strings tightly, allowing the guitar to stay in tune to improve playing enjoyment. The Grip-Lock is a mechanical type locking system that can be used on any guitar, including non-trem or acoustic.Staggered sets are used on headstocks that are straight such as Strat and Tele. The staggered set provides correct string break and eliminates the need for string trees.