Our XT CNC machined tuning screw driver features the same feel, comfort, and adjustable length functionality of our nut drivers. The tip is specifically designed for model engine tuning and a rubber flywheel stopper saves your thumb from unneeded abuse. The handle is gun metal anodized for a sleek appearance and wear resistance. Soft knurling on the handle produces a high grip surface, reducing the risk of it slipping out of your hands when covered in oil or fuel. An M5 set screw holds the tip in place so you can be sure it wont come loose or strip out. Engine tuning is a breeze with the extended reach of the flat blade tip.