Air-Powered Carving Set with 1/2" Piston Includes 1/2-B air tool, chisels, air hose assembly and canvas tool wrap Carve stone faster, more precisely & with less fatigue. Highest quality carbide chisels: 1/2" straight blade, 5/8" rondel and 3/4" tooth Everything you need to get started! Requires 5 HP compressor. All with the famous Trow & Holden guarantee!