【Upgrade Material】The vertical chainsaw sharpener is made of high-strength heavy-duty steel, wear-resistant and durable. 【Adjustable Width Freely】Upgraded to a connected adjustment slot, which allows you to fix any board suitable for the size range, save time and effort 【Wide Application】Easily cut cedar, walnut and oak into good lumber by chainsaw mill guide, perfect for builders and woodworkers 【Perfect Cutting】Vertical cutting, More convenient, direct and precise cutting of wood. This portable chainsaw mill can be used with Stihl MS-441C, Stihl 362 and Stihl 021 blades.