One advantage of Hinderer XM series knives is that you can easily customize them with standard scales of different colors. Whether you want your knife to be conspicuous when using it in the field or you only want a different color, swapping is stress-free. Remove the scale screws, change the handle, and replace the screws. G 10 carbon fiber, the material used to make Hinderer XM-18 scales, is almost indestructible. The manufacturer uses high-precision machines to produce textured handles for excellent traction and comfort. XM-18 Scales are compatible with all Hinderer XM-18 knives of 3.5" length.