TESTORS-Model Master: Hobby Knife. This pen-style craft and hobby knife features a soft grip handle and an optional roll-stop adapter that can be placed on the knife to prevent it from rolling across your work surface. The angled blade is replaceable and includes a protective cap for safety. The blade is 1 inch long and the overall length of the knife is 5-1/2 inches. This package contains one knife and one roll-stop adapter. Made in USA.