The Senco SLS20HF air powered tongue and groove floor stapler, item# 490021N, drives 1" leg 19 gauge 3/16" crown Senco R series staples. No lubrication required. Comes with one year manufacturers warranty. This flooring stapler virtually eliminates tongue splitting and surface damage. Drives staples at a 45 degree angle every time. Its front block easily adjusts for different floor thicknesses and tongue locations. The Senco SLS20HF tongue and grove floor stapler is great for installing 1/4", 5/16", 3/8", and 1/2" thick solid hardwood and laminate flooring.