Features: Ergonomic, curverd T design for maximum comfort & perfomance 3 unique socket sizes on each end: -10mm (3/8") socket for mounting truck bolts -13mm (1/2") socket for axle nuts -14mm (9/16")socket for kingpins Hollow center for allen key/screwdriver storage Double sided, 3mm allen key/phillips head screwdriver included for alternative tightening methods Freshen up your raw set-up with the Ultimate Ninja Tool from Sushi! With its new, ergonomic design, this revolutionary tool uses the latest technology to make keeping your skateboard nice & tight, easier than ever! Furthermore, the easy to access allen/phillips tool at the center makes maintaining your ride, less of a chore! Pick up yours today & literally let the good times roll!