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 & BradNails: 1/4" TV #137-190, 5/16" TV #137-364, 3/8" TV #137-406, 1/2" TV #139-337, 9/16" TV# 353-562 & 1/2" & 5/8" 18 Gauge Brad Nails.