RAZOR SHARP 9mm PRECISION BLADES - These blades are made from Japanese tool grade steel for unparalleled sharpness and superior edge retention. The long lasting precision of these blades allows you to work longer uninterrupted. CONTAINS 50 BLADES / 650 SEGMENTS - You'll receive 50 blades in this refill pack. Each blade contains 13 razor-sharp ABB Carbon Steel Snap-Off segments (650 segments total). Simply snap for a new sharp blade edge. COMPATIBLE WITH 9mm KNIVES - OLFA's ABB Ultra-Sharp Black Snap-Off Blades are compatible with most 9mm precision/utility knives. For best performance, pair OLFA 9mm blades with OLFA 9mm handles. The precision replacement blades are available in quantities of 10 Blades (ABB-10B) and 50 Blades (ABB-50B) 2PACK ( 100 BLADES)