Multi Grommet Tool Kit, Used To Repair Canvas, Tarpaulins, Tents, Awnings, Sailcloth, Lawn Furniture & Pool Covers, Contains Grommets With Hole Cutter & Hardwood Backer Block, Hardened Mandrel & Anvil, Setting Tool & Anvil Are Coded With Lines For Each Individual Size Grommet, Includes 10 Each #2 3/8" & #4 1/2" Solid Brass Grommets.