Assorted Machine Tool Holders and Morse Taper Adapters Durable steel machine tool adapters and holders in various sizes. This set includes Morse taper shanks, a jig bore adapter, and extension sleeves. The pieces have a dark metallic finish with visible surface rust on several components. One tool has a black oxide coating and is marked for precision components. The collection includes various lengths ranging from approximately 6 inches to 12 inches as shown by the measuring tape.