Special Notes: *Reversible design allows axle to be extended without running adjustment bolts all the way out, increasing strength. The Tusk Racing Axle Blocks are precision CNC machine from lightweight 6061-T6 aluminum for a perfect fit to replace your stock axle blocks. With an anodized finish to resist corrosion and to give your machine that factory look. Add a little extra style and functionality to your motorcycle, ATV, or UTV with Tusk quality products! Lightweight design made from billet 6061-T6 aluminum and anodized. Clear, easy to see adjustment marks to ensure proper wheel alignment. Sold in pairs.