Esselte leitz 5552 heavy duty metal stapler grey 60 sheets of 80gsm paper staples up to 60 sheets closed stapling spring loading staple refill indication window takes 2510 staples includes 1000 staples 10 year guarantee silver features capacity of stapling 6 mm60 sheets 80 gsm paper spring load technology the refill compartment pops open at the touch of a button an easy view window shows exactly when the stapler needs to be refilled soft ergonomic handle uses staple no 2510