Project scope and tool compatibility are key factors when selecting the right Stinger Cap Fasteners. NailPac systems are often preferred for applications where nail-based fastening is required, while StaplePac systems work with cap staplers and cap hammers. Staple size also matters, with options such as 3/8 inch, 7/8 inch, and longer staples for heavier materials or layered installations. Each pack is designed to cover roughly 25 squares, which helps estimate material needs before starting a job. Choosing the right configuration ensures efficient installation and reliable performance across different surfaces.