Main Features: 1.Standard: Double Ended 2.Process: Fully Ground 3.Surface: Bright 4.Material: HSS 4341/9341/M2/M35 5.Advantage: High Performance 6. this drills have flutes and cutting points on both ends. thisallows the user with the ability to reverse the drill and utilize both ends. 7.135 split point starts drilling immediately. 8.twice as many holes as a single end drill bit. 9.used primarily in small machine shops and automatic body shopsfor drilling holes for  sheet metal screws or rivets. 10. for drilling thin sheet metals, steel sheet, sheet brass,sheet aluminum and plastic sheets. 11.Available in plain(A),bell(B) and radius(R)type