Oneway Thread-Lok Ferrule, 5/8 in. is a cleverly engineered machined aluminum ferrule designed to let you create your own unique turning tools using your personal tool handle designs. This ferrule features an internal threaded taper that screws onto the matching taper of a wooden tool handle, which must have a hole drilled into its center to accept the tool and allow adjustment of the "stick out" length. Locking screws in the ferrule secure the tool to the handle, and by adjusting the stick out, you can achieve the balance for easier use and manipulation. If the ferrule ever loosens, simply twist it further onto the taper to lock it firmly in place again. It also accommodates double-ended gouges in wooden handles. Thread-Loks come in four sizes—1/4", 3/8", 1/2", and 5/8"—with the size indicating the tool blade diameter the ferrule will accept. Additionally, metal template patterns for each ferrule size are available separately to help you quickly turn the correct tapers on tool handles for a fit. Model Number: 3635