5pcs HSS Machine Reamer 5.1mm to 11.9mm H7 Tolerance Precision Chucking Hole Finishing Tool

Model Number: Reamer
DIY Supplies : Metalworking
Material: High Speed Steel
Use: Metal Drilling

Machine reamers increase the size of a previously formed hole and leave very smooth sides.
Reamers: Rotary finishing tools with straight or helical edges for reaming or truing holes.
A reamer has a or more teeth and is a rotary tool used to take away a thin layer of metal from a machined finishing. Reamed holes can be precisely sized and shaped.
Drills drill holes with high efficiency and speed for roughing holes. Reamers are used for hole finishing, improving the finish and accuracy of holes after drilling.