Keeping your Husqvarna chainsaw sharp is key for safe, easy cutting. This H30 combination guide is the official tool for the job. It's a two-in-one gauge: it helps you file the cutter teeth at the correct angle AND it sets the correct height for the depth limiter (raker) teeth right after. It's made for chains with a 0.325 inch pitch and a 4.8mm file size. You use it with a round file and a flat file. By keeping everything at the right specs, your chain will cut smoothly, reduce kickback risk, and last longer. An essential maintenance tool for any Husqvarna chainsaw owner. Just match it to your chain's specifications.