Material: Carbon steel;size:129mm/5"; Attention: 1. please keep them away from little ; 2. If you receive a defective product or have any problems about , please feel to , we will help you as soon as possible. Application:Easily enlarges bridge pin holes, headstock, tuner holes for guitars, ukuleles, basses, models or RC airplanes, a safer DIY tool.Our taper reamer tools smooth the surface of holes in wood, metal, plastic and softwood. Design:The T-handle provides better leverage and can be operated with hand to create more precise holes than a drill bit, while the removable handle design makes it easier to carry for storage. Dual-use design: The reamer can be used manually or electrically, manual use is suitable for some fine work to ensure the integrity of the material; the head of the hexagonal handle design, can be adapted to the use of power tools, more convenient to use. High Material:Reamers are made of high-quality carbon steel with 5 precision cutting edges to help align holes, ream and countersink holes in softer metal, plastics and wood, and deburr holes. Size:129mm/5"