Features: Tools have no finish or coating. They are good for general purpose applications. The straight reamer is used for accurately reaming aluminum, cast iron, copper, magnesium alloy, plastics, wood etc. The hand reamer can be operated by hand with a wrench and is used for light cutting, repair work, loose addition or just enlarging the hole. Specifications:* These holders can be used to cut metal on lathe.* Straight groove, smooth and accurate hole.* Reaming reamer can improve hole accuracy and reduce surface roughness.* Precision: H8* Material: 9crsi alloy tool* Diameter: 3mm ~ 32mm* Surface treatment: no coating Package include: 1 * hand drill reamer Be careful: Due to various factors such as display brightness and light brightness, the actual product colors may be slightly different from the pictures shown on the website