Lightweight and portable design for outdoor use The compact sharpener is easy to carry, so you can take it with you wherever your chainsaw work takes you. Wide compatibility and secure fit Specifically designed to fit 14', 16', 18', and 20' chainsaws. It is built for use with two holes on the outer side of the blade. The sharpener features two pins to secure the chainsaw bar, with one pin adjustable. The distance between these pins ranges from approximately 0.7 to 1.3 inches, ensuring a snug fit across different models. Safe and fast operation Engineered for user safety and efficiency: you can sharpen without direct contact with the grinding stone. By gently extruding the chainsaw, sharpening occurs quickly thanks to the upgraded design that provides a fast and easy method for chain sharpening. Easy to use Installation is straightforward. Mount your chainsaw onto the sharpener using its two holes, close and lock the sharpener, then gently extruding the chainsaw handle. Use scenarios In the field during forestry, construction, or outdoor work, you can quickly restore chain sharpness onsite without transporting equipment to a workshop. On remote job sites or campsites where access to a workshop is limited, this sharpener provides a practical, portable solution for maintenance. For home or shed work, you can perform regular upkeep between projects to keep chains cutting efficiently.