Use to repair or add grommets to tarps, tents or awningsIncludes hardened-steel hole cutterCutter and mandrel are heat treated for long-lasting performance General Tools specializes in bringing customers with high quality, specialty items for jobs of all types. The General Tools 1/4 in. Grommet Kit includes a hardened-steel hole cutter, a matched mandrel/anvil pair, a hardwood backer block and an assortment of grommets – everything you’ll need for repairing or adding grommets to tarps, tents, awnings and pool covers.Economic solution for repairing or adding grommets to tarps, pool covers, canvas tents, awnings, sail cloth, lawn furniture and other materialsBrass grommetsHardened-steel hole cutterHardwood backer blockCutter and setting tool (mandrel) are heat treated for a long-lasting performanceBlack-oxide plating helps prevent rust1/2 in. grommet diameterMandrel has a knurled body for comfort and safety