Desktop Cartridge Electric Stapler with LED Guide, 25-Sheet Capacity, BlackSwingline 502e Desktop Cartridge Electric Stapler is protected by durable plastic housing and is ideal for desktop use, in a mailroom and other office environments. Patented cartridge design includes a new driver head, the most used part of the stapler, with each new cartridge. Each cartridge holds 1,500 staples and can staple up to 25 sheets at once. Convenient spring loaded lid opens upward for easy access to the staple cartridge. LED guide shows