The Big Horn 19565 3 in 1 Shoulder Plane is a versatile woodworking tool for fine-tuning tenons, cleaning up corners, rabbets, and other joinery projects. Equipped with two different nose attachments, the longer nose attachment produces a shoulder plane while the shorter nose attachment converts this tool into a bull-nose plane. Removing all noses converts this plane into a chisel plane. Its 1'' blade is slightly wider than the plane body, ensuring clean corners without leaving ridges. Crafted with precision, both the fine iron castings and the blade are flat and accurately ground. The sides are meticulously machined square with the sole for optimal performance.