Also called 'toric'. Curve both vertically and horizontally to enhance peripheral vision.
The best system to secure your file, diamond or other stones on the File Guide and without damaging them. Ergonomically designed to place your thumb on top and your forefinger on the 'trigger' (on the underside of the guide). Easily loosen the spring loaded clamp with one hand. Made of steel, tough plastic and nylon. Highly recommended as a much better choice than using a Spring Clamp.
Fits on 91, 92, 93 and 94 degree SIDECUT File Guides.