Westcott Trimair 12-Inch Titanium Bonded Rotary Paper Trimmer (15482) 45MM Titanium Bonded Blade is 3X harder than steel Ideal for home, office, school and craft use Cuts up to 10 sheets of paper, photos or film quickly, simply and accurately No touch safety shield protects fingers by keeping the blade totally encased and only exposed when the carriage lever is engaged EZ change blade technology allows one touch removal of the old bland and simple snap on of a new blade