New Bostitch Heavy Duty Premium Staples, 2-25 Sheets, 1/4"- Lot of 5 These stapler refills are built to resist bending and jamming, even in heavy-duty staplers. Made with strong steel and sharp points, they can easily pierce through stacks of paper (from 2 to 25 sheets). They work with most heavy-duty staplers and even specific Bostitch models (listed). Plus, you get a whopping 5,000 staples in a pack for long-lasting use.