Long Working Life, One-year WarrantyManufacturer of 10 Years, ISO9001,CertificationFactory Price, Stable Quality, Free and Fast ShippingPacking1 set (2" Drill Depth):11Pcs: 7/16"+1/2"+9/16"+5/8"+11/16"+3/4"+13/16"+7/8"+15/16"+1"+1-1/16"1Pc: Pilot pin 4.74/5.3 * 102mm1Pc: Pilot pin 6.34/5.3 * 102mmUS stock fast free shippingMade of high quality high speed steel. Adopting multiple-ply, which guarantee smooth cuttingMulti-cut geometry for ply-cutting to improve performance of centering as well as removal of chipsVarious performance of products to meet requirements of hole cutting on various materialsApplicable to hole cutting and process of annular groove on various magnetic drills and pressAssemble with the pin in the set