The Lansky LDHMD Spare Med Dia Hone Spare Medium Diamond Hone is a high-quality sharpening tool designed for use with the Lansky Controlled Angle Sharpening System. This medium grit hone features an uninterrupted diamond coating, providing a consistent sharpening experience. The brass threaded insert allows for secure attachment to the system's stainless steel thumb screw. The ergonomic plastic housing provides a comfortable grip during use. Made in the USA, this hone is built to last and deliver precise results. With fast shipping, you can get started on your sharpening projects right away.Product Features and Specifications: Made in the USA Medium Grit (280) diamond surface Brass threaded insert for stainless steel thumb screw Ergonomic plastic housing