This medium duty knife is 7/16 inches in diameter and 4 3/4 inches long. It has a 4 slot point chuck for easy blade release. This knife comes in handy for a variety of hobby applications. Its uses include precision cutting, trimming and stripping of paper, plastic, wood, cloth and film. It's also great for separating plastic model parts. This knife includes a safety cap. Excel is known for making high quality blades and tools for hobbyists around the world.