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 #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.