Regularly $1.97 - 25pc Replacement Precision Knife Blade Set. Replace the most popular blades in your set. This set includes: two #7, two #10, seven #11, four #12, two #17, two #19, two #20, two #21, and two #23 knife blades. Works with 1/4 inch and 3/8 inch Type A, B, C, and D Handles.