Excel 16001 K1 Light Duty Aluminum Knife Handle with Blade and Safety Cap. 4 jaw machined aluminum chuck for secure blade positioning. Used for precision cutting, trimming, and stripping on paper, plastic, wood, cloth, and film. Size: 5/16 x 4 3/4 inch. Blade holder is removable and has 10-24 male threads. Fits 1/4 inch Type A X-ACTO or Excel Blades. Made in USA