Abstract: Holders for wrenches which have an open end. Vertically extending spacers and a transversely extending pin cooperate to retain vertically hung wrenches in the holder. A releasable latch can be provided to keep the lower ends of stored wrenches within the bounds of the tool holder. This keeps tools from falling out of the holder if it is roughly handled, dropped, turned upside down, etc. Devices for attaching the holder to a support may also be provided. This keeps the tool holder handy in many instances, facilitating access to stored materials. Attaching the holder to a support will also keep it out of mud, spilled lubricants, and other muck.