Complete hole saw assembly including arbor, pilot drill and ejector spring, specifically for cordless power tools. Safety stop at the base prevents cutting beyond the hole saw depth 13mm (½"). Cuts stainless steel sheeting, tool and mild steel sheeting, wood, trunking, thin plastics and thin non-metallics. Recommended cutting depth 3mm. Cuts Stainless Steel Sheeting, Tool & Mild Steel Sheeting, Wood, Trunking, Thin Plastics & Thin Non-Metallics 43.2mm Arbor Length 24.3mm Pilot Drill 1/4" Hex Shank Steel Slotted Barrel to Aid Removal of Debris For 1/2" Chucks - Use with Pilot Drill Cuts Stainless Steel Sheeting, Tool & Mild Steel Sheeting, Wood, Trunking, Thin Plastics & Thin Non-Metallics 43.2mm Arbor Length 24.3mm Pilot Drill 1/4" Hex Shank Steel Slotted Barrel to Aid Removal of Debris For 1/2" Chucks - Use with Pilot Drill