A tool having two adjacent blades, for working fluent materials such as cement, plaster, and epoxies in corners and other angled areas, is shown and described. Each blade is angularly adjustable with respect to an included angle defined between the two blades. The tool may have right and left blade portions pivotal along abutting or adjacent edges, and a linkage including a releasable clamp to establish and secure desired working angles between the right and left blade portions. The tool has two pivot axles, one for supporting each of the right and left blade portions.