Omega Products Standard Reduction Sleeve for Slotted Boring Bars is a precise adapter that fits your slotted boring bar and accepts smaller tool shanks. With an outer diameter of 16 mm and an inner diameter of 10 mm, this sleeve provides a reliable, repeatable interface for a wide range of milling and drilling tasks. Slotted interface for secure grip: The slot design enables clamp screws to engage the tool shank securely, delivering consistent concentricity and reducing runout during high-speed machining. Precise 16 mm OD and 10 mm ID: Engineered to exact dimensions, it delivers a repeatable, snug fit with compatible slotted boring bars and tools for dependable performance project to project. Durable, high-quality construction: Built to withstand frequent tool changes and demanding cutting environments, maintaining accuracy and reliability over the long term. Using the Reduction Sleeve streamlines tool changes and helps maintain consistent results across projects. The reliable 16 mm to 10 mm interface minimizes variance in setups, supporting cleaner holes and smoother milling while standing up to daily workshop use. This sleeve is a dependable, straightforward addition to any shop or production floor.