D Ring Loop Tether One of the simplest and most effective ways of preventing accidental drops of tools when working at height is by using a D Ring loop tether. Ideal to use with a multitude of construction tools, such as spanners and hammers, this self-tethering accessory keeps your tools and colleagues safe from accidents. Made of high-quality material and featuring an incredibly robust D Ring, the D Ring loop tether is a versatile and trustworthy solution to securing your equipment effectively. Furthermore, D Ring loop tethers can be retrofitted to just about any object, saving you the expense of buying new tools.