Bottom-load magazine uses 6 sizes of T50(R) staples–1/4-9/16 & 18-gauge brad nails up to 1 ; Sets staples & nails right on virtually any surface ; Up to 60% more power–more versatility on the job ; Easy-to-squeeze patented design–less fatigue on the job ; High/low power setting–drives into hard & soft surfaces ; Integrated wire guide to safely install low-voltage wire ; Ergonomic rubber grips for comfort;