The Central Pneumatic ¼ in. Compact Die Grinder, available at Harbor Freight, comes with an affordable price tag and could be a solid addition to any professional or hobby toolkit.

This 1/3-hp mini die grinder from Snap-On has a 10-position air regulator, adjustable rear exhaust, and an ergonomic grip. It’s made for surface prep, grinding welds, cleanup, and more.

Match the blue and red wheels to the color of the rails and you'll do fine while performing stunts. If you don't then your Grinder will short circuit.