Abstract: Example embodiments disclosed herein encompass disposable cover systems for a power tool, as well as covers, components, and methods. A disposable cover system may include a cover defining an inner cavity to receive a power tool and an aperture through which a pass-through to transmit movement from the power tool to outside the cover is extendable. Trapping a portion of a cover which surrounds the aperture, between first and second compressible members for example, may form a seal around the aperture. Transmission components including a pass-through, adapters to adapt a cover to a transmission component, multi-part devices to create an aperture, and related methods are also disclosed.