The question you ask is dependent on the chain in use not the saw that drives it. To determine what chain is installed we must see the chain. A local seller/mechanic should be willing to answer your question. Lowes will not know!!!
Excerpt from "How To Sharpen a Chain Saw
" here follows:
Use the right tools
If you're holding it correctly, a proper-diameter round file simultaneously restores the three different angles of a saw-chain cutter. Different-sized chains and different cutter styles call for different file diameters. It is vital to use the right size file.
In general, 1/4- and 3/8-inch-pitch, low-profile chains call for a 5/32-inch file; 0.325-inch-pitch chains require a 3/16-inch file; and standard 3/8-inch-pitch and 0.404-inch-pitch chains demand a 7/32-inch file. Beware, however, because many exceptions exist. For example, some brands of standard 3/8-inch-pitch chain require a 3/16-inch or 4.5-mm file. Check your chain-saw owner's manual or saw-chain instruction sheet to determine the correct file diameter. If you're not sure, ask your dealer. He also may have literature showing the proper filing angles and special procedures for your chain.
Getting the angles exactly right is not as important as removing all damage from the side plate and top plate and making sure the critical top corner is really sharp. However, for good results, you must consistently hold the file at the correct height and orientation within each cutter. This is difficult to do without some type of file guide.
Like most tools, simpler is better when it comes to file guides. The best guides are plates that drop over the chain. These keep the file at the right height and attitude and have witness marks to show proper top-plate angle alignment. The best thing about this type of guide is that you can see what you're doing. Guide plates that clamp to the file and rest on the cutter top plate also are good, but they tend to obscure your view of the cutter. Whichever guide you select, make sure you get the right model for your chain.
If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH