Are you still worried about the rust of your chainsaw? Since rust on a chainsaw will greatly affect your work efficiency, replacing the chain is time-consuming and expensive. So come and try our chainsaw sharpening manual to keep your chainsaw sharp as new. Function: This manual chain sharpener can keep your chainsaw sharp and as new, greatly improving your working efficiency. Made of aluminum alloy, it is not easy to break or bend and has a long service life. Easy to install and use: simply place the clamp on the rail, position the ratchet, insert the bit and turn the handle to use it. Simply pull the chain, grind the teeth again, and the teething process is easily completed. It can be done manually without using electricity, making it convenient and energy-saving.