Excellent Quality: Adjustable manual reamer, made of high speed alloy steel, high hardness for rust protection, durability and long service life. Main function: suitable for casting process reaming and casting artisanal processing; can not be used on the machine, which may damage the blade, only by hand. Wide application: widely used for machining the bore, installed in the drilling machine, milling machine, etc. 'packaging : 1 adjustable hand reamer. Features: The blades are adjustable and move in the tapered slots in the reamer body. To adjust these reamers, the blades are moved into these slots by loosening the nut at one end and tightening the nut to another.The movement allows the reamer to be set to any desired diameter within the size adjustment range.The adjustment feature allows the reamer to maintain a specific size by compensating for wear.Can be re-adjusted to grow and bunch to proper size and sharpened.Can only be used by hand, use on a machine may damage the blade.Specifications:Material: Alloy Steel.Diameter: 13.75mm-15.25mm. Note: The data is all measured manually, please allow 1-3cm error, due to the light and display difference, there will be some color difference, the actual object received shall prevail.