For installing 3/8" Through 3/4" thick Solid & Engineered wood floors using the easily adjustable wingnuts. Works on all tongue and groove configurations. The High PRO AS-4590T Pneumatic Flooring Stapler is designed for fast, reliable fastening of hardwood flooring. The High Pro flooring nailer Precisely drives staples at the proper angle and depth. Lightweight (3.5 lbs.) With a simple pull of the Trigger this HighPro Air assisted stapler drives a 1/4" narrow crown 18-gauge staple. Small Air Compressor Required. Recommended Air Pressure 70-80 psi.