Product Name: HSS Core Drill Model NO.: 01BGW Usage: metal Drilling Material: High Speed Steel Type: Core Drill Bit Standard: DIN Customized: Customized Cutting Depth: 1", 2", 3", 4" Shank: Weldon Shank Diameter: From 12mm to 130mm Process: CBN Fully Ground Trademark: OEM available Transport Package: Plastic Case Specification: 12mm ~ 130mm Origin: China HS Code: 82075090 Product Description Feature:Multi cutting edge design, producing holes much quicker and more efficiently than conventional twist drillsFor use on magnetic drilling machinesMade from either HSS (M2) or Cobalt HSS (M35)CBN fully ground by CNC machines ensures high accuracyWeldon ShankSize ranges from 12mm to 100mmCutting depth: 30mm and 50mm1. Perfect stable start2. Conical surface inside3. Precisecenter pilot fitting4. Ground clamp surface5. Faste, because of every tooth cuts6. More accurate7. Greater drill depth8.Stonger, therefore less fragile9. Guranteed slug ejection