Up to 210 sheets can be stapled with the Kangaro HD 23S24 Heavy Duty Stapler: Completely metal construction A paper guide that can be adjusted to clear jams Rubber base to prevent scratches on the desk top loading from the back Anvil rotation Use of staples: 23/6-H to 23/24-H Capacity for loading: 100 staples Capacity for Stapling: 210 Sheets