Shop for Tools & Hardware at The Home Depot. The NuMax SC22US 1/4 in. - 5/8 in. 22-gauge pneumatic upholstery stapler is the perfect tool for your upholstery projects. The NuMax SC22US uses a common 3/8 in. C-Crown upholstery staple most comparable with the Senco 71 Series C-Crown staple. However, you may use any brand that is comparable to the NuMax 3/8 in. C-Crown upholstery stapleâ€ s gauge, length and crown width specifications. The NuMax SC22US comes with an extended nose for hard to reach places, a die cast aluminum body for light weight durability, a trigger safety and adjustable exhaust to direct air flow away from the user. The NuMax SC22US can be powered with any compressor that can reach minimum operating pressure of 70-100 psi. NuMaxâ€ s high capacity bottom load magazine allows you to re-load quickly and work more efficiently. Itsâ€ 185 round magazine capacity allows you to work for extended periods of time. NuMax is built with value in mind. Itsâ€ excellent quality, factory warranty and affordable price makes NuMax your obvious choice for your upcoming upholstery project.