Set Of 3 Pieces HSS Step Cone Drill Hex Titanium Bits Hole Cutter

Description: The ladder unique structure a open a variety of specifications of aperture; Do not need to use center punch compared with twist drill is not easy to be broken; Deburring chamfering elliptic hole enlargement twist drill the function of them was but it is possible; The usage of tools: drill bench drill. Work while water cooling can effectively extend the service life of drill bit; Great for drilling holes in sheet metal when you don t want to sort through a collection of drill bits; Specification: Material: High-speed steel 4241 Surface Treatment: Titanium Coated Dimension ( L x W x H ): 80 x 40 x 20mm/ 3.15 x 1.57 x 0.78 Size for Each Piece: 4-12mm: 4 6 8 10 12mm 4-20mm: 4 6 8 10 12 14 16 18 20mm 3-12mm: 3 4 5 6 7 8 9 10 11 12mm Package Includes: 3 Pieces HSS Steel Drill