Compatible with Mast Archer and Mast Saber wireless tattoo machine. Closeness to your cartridge needles and the robust ratchet disk click system. Easily adjust the needle depth from 0mm up to 4mm, and never worry about involuntary turning, even when using heavier machines. Specifications: Compatible with Mast Archer and Mast Saber wireless tattoo machine. Package includes: 1 box of?10 PCs Dragonhawk Disposable Grips