Desktop Electric Staples in a cartridge fasten 2 to 25 sheets with Swingline Desktop Cartridge Electric Stapler 520e and 50202. It easily loads into the stapler. Patented cartridge design replaces the most worn part of the stapler each time a new cartridge is inserted. Sharp chisel points bring better penetration and reduce jamming. Crown width is 1/2". Leg length is 1/4". Each cartridge holds 1,500 staples.