Master Mechanic, 2-in-1, Heavy Duty, Staple Gun, High Low Power Switch For Driving Control, Integrated Staple Puller, Bottom Loading Jam Free Magazine, Reversible Belt Clip, Refill Indicator Window, Compatible with Arrow T50 Staples & Brad Nails: 1/4" (TV# 137190), 5/16" (TV# 137364), 3/8" (TV# 137406), 1/2" (TV# 139337), 9/16" (TV# 353562) & 1/2" & 5/8" 18 Gauge Brad Nails.