It's a fine tool, but this specific sharpener is for a .404 pitch chain. The guide rail will barely catch the tip of the next tooth on a 3/8" pitch chain when sharpening as intended. This would however work well for sharpening a 3/8" pitch ripping chain sharpened at 10 degrees. The model 17303 is the one to buy for a regular 3/8" pitch cross-cutting chain.
I'm hoping Saw Suppliers will let me exchange this item considering their site has incorrect information in the item description.