Keystone Machine and Fabrication is a contract manufacturer that specialises in close-tolerance, high-precision machined parts for the industrial and aerospace applications. Large and small precision-machined parts, such as manifolds and calibrated measuring devices, can be milled and turned by us. Many on-site engineers and fabricators can complete nearly any order in a very short amount of time, sometimes even the same day. Edm wire cutting, mills, lathes, and everything in between.