Rite Bobbins provide precise, repeatable thread tension through a simple screw-disc adjustment. Each 2-3 turns on the disc adds about 1 ounce of tension to the tying thread, giving you predictable pull and consistent results in knots and finishes. The tubes feature a ceramic insert for a lifetime of use, resisting wear and preserving thread integrity under repeated use. This combination delivers reliable performance where control matters most. - Adjustable screw-disc: adjust tension in small increments (2-3 turns equals ~1 oz) for fine control - Ceramic insert in tubes: durable, low-friction surface that extends service life and minimizes thread wear - Consistent results: maintain uniform tension across multiple applications and materials - Rugged design: built for demanding applications in crafting, tying, and precision work