20.5mm Twist Drill Bits Black Nitride Coated HSS-9341 with 1/2" Reduced Shank 106. 1mm ID to 78.1mm OD peel off the adhesive backing

peel off the adhesive backing paper and stick it on the clean surface

Inner Diameter x Outer Diameter: 14

Note: The positive and negative pole

Body Size:38 x 32 x 31mm/1

Male Thread Diameter: G1/2

20.5mm Twist Drill Bits Black Nitride Coated HSS-9341 with 1/2" Reduced Shank 106. 1mm ID to 78.1mm OD peel off the adhesive backingSpecification: Cutting Diameter: 20. 5mm 0. 81" Shank Diameter: 1 2" 12. 7mm (approx.) Cutting Edge Length: 81mm 3. 19" Overall Length: 152mm 5. 98" Material : High Speed Steel 9341 (HSS 9341) Finish Type: Black Nitride Coated Shank Type: Round Shank Tool Flute Type: Spiral Hardened to: 62 65 HRC Descriptions: 1. High speed steel tool is good for most general purpose applications, featuring a combination of hardness and toughness for wear resistance