Material: Made of high-quality 304 stainless steel, durable and practical; holds the knife securely during sharpening for efficient use. Flexible and adjustable: features an adjustable bolt design, suitable for most sinks. Compatible with whetstones ranging from 7–24 cm; fits sink widths of 28.5–42 cm. Butterfly-style clamp for easy installation and precise distance adjustment. Wide compatibility: works with various whetstones, including ceramic, diamond, and natural stones. Specification Material: 304 Stainless Steel Dimensions: 41 x 6.5 x 4.5 cm (16.14 x 2.56 x 1.77 inches) Package Includes: 1 x Sharpening Stone Holder Note 1. Slight measurement variations may occur due to manual measurement. 2. Monitor settings may cause color discrepancies between images and the actual product.