Pack of 5 pieces of Olfa HB-5B, 25mm extra heavy duty segmented snap off blades in a plastic dispenser. To fit the Olfa H-1, NH-1 and XH-1 these will also fit all other types of retractable snap off handles such as the Stanley Interlock, Stanley FatMax. These are razor sharp top quality blades and are perfect for construction and industrial applications such a carton opening, warehousing etc.