kwb Drill Bits & Parts Metal twist drill bit set 610655 - KWB 420400, The kwb 420400 metal twist drill bit set includes nine assorted drill bits suitable for various universal applications. Manufactured by kwb, this set is designed for precision in metal drilling tasks. It is ideal for both professional and DIY projects requiring reliable and durable performance. kwb 420400 9-piece Twist Drill set HSS Metal Carbide Wood Concrete