Easily attach a chuck using the 1 inch x 8 TPI external threads for added versatility. Made from strong, steel, the adapter body ensures significantly extended life. Upgrading and adapting your 5/8 inch lathe spindle to the 1 inch x 8 TPI standard opens up a world of possibilities. Easily enhance your lathe's capabilities by installing 5/8 inch internal threads on your spindle. Weighing in at 0.61LB, measuring 2.5 inch long and 1.77 inch wide, this compact adapter seamlessly extends the length of your spindle by approximately 1-1/4 inch, providing greater and control for your woodworking projects., Manufacturer: Akfldms