Product Description This 3-1/2" long, high speed steel reamer is right-hand cutting with a 45 degree end, and is used for enlarging the factory sear pin hole to accept an oversized pin. Swenson 1911 Sear Pin Reamer .1100" Diameter at MidwayUSA $28.99 Buy Now Check Price on Amazon Check Price on eBay Category: Hand ToolsColor: GreysSize: .1100"