We've embedded nuts and bolts, shells, glass, and more recently, metal shavings into concrete.
These tops have bicycle parts in them, which will be exposed in the finishing process. We're casting these for a bike shop in Brooklyn, NY.
Bicycle Roots, which is opening a showroom and repair shop on Fulton Street very soon (read about them here), has chosen to cast bike parts into their new concrete countertops.
Great big thumbs up from us.