extra amount of cord 5 when the leash is short the friction device 4 may be a cord lock which holds the cord securely in place the tubular webbing 2 is selected so as to be flexible and yet provide sufficient strength for the device 7 to restrain a dog when extended as shown in fig1 suitable tubular webbing is tubular polyester webbing or tubular nylon webbing which can be obtained from strapworks com of eugene oreg different embodiments may have different versions of the same material to provide different strengths or different embodiments may use different materials other materials that may be considered instead of or in combination of the tubular webbing include flexible neoprene tubular cotton products and most any other supple yet sturdy tubular material fig1 is an illustration of the dog retention device 7 at full extension to act as a leash as indicated above rather than wire rope or cord the main part of the device 7 is comprised of a tubular webbing or similar material 2 when the dog retention device 7 is used as a leash the internal cord 5 is located inside of the tubular webbing 2 and serves no function the swivel hook 6 is the attachment point to a separate collar or harness already on the dog not shown in fig1 the two part snap 1 magnetic bead 3 and friction device 4 remain present but serve no function when dog retention device 7 is used as a leash when a leash is not needed the user loops the retention device 7 around the dog 39 s neck or body and snaps it together as shown in fig2 to be used as a collar or.