Motofool33, thank you for your purchase and review. While you can clean bolts with solvents, wire brushes or wire wheels on a bench grinder none are as safe or fast as the Thread Wizard. We can clean a handful of bolts in the time it takes to address one on the wire wheel. The tool was invented by 40 year master mechanic Gary Taylor after a wire wheel grabbed a bolt from his hand and shot it towards his face, nearly hitting him in the eye socket. The handle is high quality ABS plastic, the brush is high quality carbon steel and the plates are stainless steel. All our parts are sourced from and made in the USA and our tool is manufactured completely in the USA. The tool can be rebuilt with our repair kit but in the years we have been using our prototype, we have yet to wear out the initial wheel after thousands of bolts. A trick to extend the life of the wire wheel is to index the wheel and when it begins to wear, pivot it to expose fresh wire to each hole.