Priced as a single 1.5" Countersunk Bolt, and 3/8" Nut
Most set ups need 8
We would recommend 8. We have seen people not use 8. But we would use 8. Call us overachievers.
The 1.5" size is adequate for most longboard and skateboard set ups, and even has room left to facilitate a 1/4" riser.