Drill Bit Set For Use In Any Kind of Drilling Machine A Complete Set Having 13 Dril Bits of Smallest To Big Size And All Sizes In Between If You Are Trying To Make A Drill Hole In The Wall , First You Need To Make A Hole With Help Of A Nail And Hammer And Then Used The Drill Machine With The Drill Bit. If You Do It Directly The Drill Bit Is Bound To Break Or The Machine Will Not Function Properly. Our Drill Bits Makes Things Much Easier For You As You Do Not Need Help of Mechanics. Compatible With Electric Drilling Machine As Well As Manual Drill Machines Also Works With Hammer Action Drills