Viking Type 490 Twin End (Double Ended) HSS Drill Bits are ideal for quickly drilling thin and lighter gauge metals and sheet metal. May also be used for wood and some plastics. Popular in Automotive, Body shop and HVAC applications for quickly and economically drilling pilot holes for Pop (blind) rivets and small screws. Twin End bits essentially provide two drill bits for the price of one, making it an economical choice when used in the manner for which it is designed. The Type 490 bit is a heavy duty industrial grade bit that features a 135° Split Point that allows the bit to self-center, resists walking and can start a hole without the need for a center punch. Manufactured in America of high speed tool steel and finished with a black oxide coating for maximum lubricity and long life.