The $US40 supercollar has a three foot retractable leash made of wound steel. The steel cable attaches to the collar in two places for added strength. It supposedly can withstand "100s of pounds of tugging pressure."
One supercollar for one super dog means you can finally enjoy a tugfest, oops I mean a walk, with your wonderful canine friend. Of course, you could ditch the idea of a supercollar and spend that money on obedience classes. The first thing he will learn is heel. [Supercollar via 7Gadget and Oh Gizmo!]