General's grommet kit contains 24 brass grommets with hole cutter and hardwood backer block, hardened steel mandrel die, and anvil. Setting tool has knurled body for greater comfort and safety. Sizes are individually marked on setting tool and coded with lines on anvil. Setting tool and cutter are heat treated for long life. Black oxide plating prevents rust. 3/8" (10mm) size great for banners and signs. #71262 grommet kit.