A sink sharpening stone holder that gives you a stable, rustresistant platform to sharpen knives and blades safely and precisely. Key benefits Stable sharpening every time: The card slot plus butterfly bolt design locks the holder in place across the sink edge, preventing movement or slipping while you work. Built to last: Thickened stainless steel construction resists bending and deformation so the holder stays reliable under repeated use. Waterready and low maintenance: Rustresistant stainless steel stands up to wet environments without corroding, so it remains safe and functional in kitchen conditions. Broad compatibility: Telescopic adjustment from 310 mm to 460 mm fits about 99% of sink types, so you can use it at home or in a professional kitchen without guessing fit. What it does (features and specs) Material: Thickened, rustresistant stainless steel for strength and oxidation resistance. Size/adjustment: Telescopic range 310 mm–460 mm to clamp securely on most sink edges. Mounting: Card slot plus butterfly bolt clamp secures the holder to the sink and provides a solid base for consistent sharpening angles. Function: Provides a fixed support for sharpening stones so you can maintain steady pressure and accurate angle when sharpening knives and blades. Practical use scenarios Home kitchen: Clamp the holder to your sink and mount a sharpening stone to restore a chef's knife, utility knife, or paring knife with consistent, repeatable strokes. Foodservice/restaurant prep: Use the holder between shifts to quickly sharpen use knives without needing a dedicated sharpening station. Outdoor and specialty blades: Secure a stone for maintaining carving knives, fillet knives, or shears after heavy use, minimizing blade damage from unstable sharpening. Quick use tips Extend the holder to fit your sink lip, engage the card slot, then tighten the butterfly bolt for a firm clamp. Rinse and dry the holder after use to keep the stainless steel surface clean and prolong its appearance and performance. This sink sharpening stone holder delivers a durable, secure, and waterresistant platform for safer, more accurate blade sharpening.