2 Holes Chainsaw Sharpener Universal with Fast Sharpening Stone. 16",18",20" Topteng chainsaw teeth sharpener saw chain sharpening tool Package included: 1 * Chainsaw Teeth Sharpener with Fast Sharpening Stone (same as picture show) The chainsaw sharpener is designed with 2 holes, for fixing the sharpening knife, one hole is fixed, the other is move back and forth and take it down, very flexible, suitable for 16 Inch,18 Inch, 20 Inch, and suitable for one or two hole chain saw. The black bottom is elastic and adjusts the distance of the sharpener. (Not suitable for ECHO 16" and Husqvarna 455 20" chainsaw) Notes: If your blade has only one hole, please drill another hole on the blade before using. Portable chainsaw blade sharpener kit Easy to Install & Use The sharper is super simple to operate,just attach the chainsaw on the two holes of the sharpener. Then close and lock the sharpener. Finally, gently squeeze the chainsaw. BROAD COMPATIBILITY This chainsaw chain sharpener just fit for 16” 18” 20” with two holes on the outer part of the chainsaw blade. There are 2 pins on the chainsaw sharpener for fixing the chainsaw bar. The second pin is adjustable. The distance between these 2 pin (holes) is about 0.7-1.3inch. Bonus Whetstone & Instructions An extra replacement sharpening stone is included.It is easy to replace the stone. Condition: Brand New. Fast and Efficient This chainsaw sharpener is not only fast but also accurate. Your chain saw become sharp only need a few seconds. It allows you to quickly and easily sharpen chain without taking off the chain. Keeps saw chain oiled for less friction and a longer lifespan. Chain Saw Blade Sharpener Chainsaw Teeth Sharpener Kit Chainsaw Teeth Sharpener Portable Bar-Mount Chainsaw Chain Sharpening Kit Fast-Sharpening Stone Grinder Tools for Saw Chain Sharpening Tool System Abrasive Tools (Yellow) Step 1: Open the Grinding Step 2： Fix the chainsaw on the hole of the sharpener Step 3: Close the sharpener and push the lock Step 4: Start the chainsaw and press down until it touches the whetstone for 3-5 second