PROFORM's Professional 16 Billet Aluminum Degree Wheel is for the serious engine builder and tuner. Easily attach this oversized degree wheel to a professional crankshaft turning socket and you're done! There's nothing better than an easy to read degree wheel when degreeing your camshaft! Product Features:Pro Model16-in. DiameterBlue Anodized Finish with White NumbersManufactured from High-Quality Billet Aluminum To Ensure Durability and ReliabilityOversize Lettering Makes Wheel Easy To Read