Oneway Thread-Lok Template 4-Pack is a set of sturdy metal templates designed to help woodturners quickly and accurately create the matching tapers on tool handles needed to fit Oneway's Thread-Lok™ ferrules. This convenient 4-pack includes one template for each size ferrule available: 1/4", 3/8", 1/2", and 5/8". With these templates, you can ensure a fit every time, making your tool handles more durable and professional. I for anyone looking to enhance their woodworking tools with precision and ease. Model Number: 3649T