Oneway Thread-Lok Ferrule, 1/4 in. is a cleverly engineered machined aluminum ferrule designed by Oneway to help you create your own custom 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. The handle must have a hole drilled through its center to accept the tool and to allow adjustment of the "stick out" length, giving you the balance for easier and more precise tool manipulation. Locking screws in the ferrule secure the tool to the handle, and if the ferrule ever loosens, simply twist it further onto the taper to lock it firmly in place again. These ferrules also enable the use of double-ended gouges in wooden handles. The Thread-Lok ferrules 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 size are available separately to help you quickly and accurately turn matching tapers on tool handles for a fit. Model Number: 3632