The double-sided hex screwdriver is a custom-made tool, which serves to access the chinrest hex screws with the thinner tip for the 1.27mm set screw, and the adapter screws, which works with the other side of the blade, a 2.00mm hex drive. For the ultimate fixation of the ball joint slider screws, you can also use the 2.00mm side of the blade. We recommend tightening the balljoint screws of the slider by turning the cushions by hand.
