Arrow T50ELITE T50 Elite Pro Easy-Squeeze Staple and Brad Nail Gun 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;