OLFA® EXCEL BLACK™ takes blade sharpness to the next level. OLFA's secret, advanced production process makes this blade 25% sharper than ENDURANCE™ blades (which are already very sharp!). You can really feel the difference as your cutter glides through the cutting surface with ease and precision. Not only do these heavy-duty blades last much longer than conventional blades, they take the strain off your hands when trying to cut tough materials such as rubber, leather, fibreglass, textiles and carpets. The 25mm EXCEL BLACK™ blade is 0.7mm thick and has 7 snap segments.