General Tools 130 T Handle Reamer, 1/8-1/2 (3.175mm-12.7mm) Tapered/Fluted, Guitar Woodworker Luthier Tool ENLARGES HOLES- perfect for when a drill could cause cracking in materials LUTHIER/GUITAR TOOL: enlarges bridge pin holes, headstocks, holes for tuners and volume/tone knobs INCREASED LEVERAGE: T-handle provides leverage for easier reaming with greater control and easier turning REMOVES BURRS: from wood, cut pipe, tubing and conduit. Inside deburring edge tool with capacity of 1/8" to 1/2" ENLARGE & COUNTERSINK HOLES: In sheet metal, plastic and other materials with little effort DURABLE: made of hardened and tempered steel with precision ground cutting edges The T-Handle Reamer is a useful tool for removing burrs from steel, brass, aluminum, plastic, wood and wallboard Made of hardened and tempered tool steel with precision ground cutting edges Precision machined cutting edges smooth metal surfaces with little effort T-handle provides leverage for easier reaming A great tool for enlarging holes in wood