Note: The color of the item may vary slightly due to photography and your own computerFeature:Reamer with one or more teeth to slit holes machined surface of the thin metal layer rotary slitter. After working through the hole slitter can obtain precise size and shape.Scope of application: reamers to ream the workpiece has been drilling (or bore) hole behind the processing, primarily in order to improve the machining precision of the hole, reducing the roughness of the surface, is finishing and semi-finishing for hole machining toolBlades are adjustable and move within tapered slots in the reamer body.To adjust these reamers the blades are moved within these slots by loosening the nut at one end and tightening the nut at the other.Movement permits the reamer to be set to any desired diameter within the range of the size adjustment.Adjustment feature allows reamer to maintain a specific size by compensating for wear.Can be readjusted to expand and reground to the appropriate size and resharpenedOnly could use by hand, use on machine could damage the blade.Maximum workpiece can not be more than 220 Brinell hardness.Safety instructions:1.Razor blades permanently enclosed in a cartridge or housing with less than 2mm of blade exposed��2.The bladed product is not use for people under 18 years.3.The item is only use for industrial slitting/engraving, not hazardous article.Specification:Color:Silver and BlackAdjustment range: 7.75mm-8.5mm Environment: handDimension:Approx.108 x 7.6 mm/4.25 x 0.299inch(L x Dia)Weight:22gPackage Include:1 x Adjustable Hand Reamer Metal Hole slitting Tool