The Interchange 18 Gauge 1-1/2" x 1/4" Narrow Crown Pneumatic Stapler (SL4018) is a compact, lightweight stapler capable of driving 3/4" to 1-1/2" narrow crown staples. It features a switchable trigger with bump fire and sequential fire, adjustable depth control, easy top loading, and a staple reload indicator. This Narrow Crown Stapler is a professional grade tool that is ideal for a variety of applications including underlayment, moldings, aluminum and steel siding, soffit, fascia and cabinet assembly.