The Nicker Screwdriver is made to fit the screw securing the nickers on the No. 10-1/4 Bench Rabbet Plane. They may be useful for other jobs as well. Modeled after gunsmith's screwdrivers with machined tips, correctly sized to fit the screw slots, giving you good power and control, without slipping. Blades are hardened 416 Stainless Steel. Curly Maple handles.