DeWalt HSS-E Cobalt Jobber Drill Bits 4mm Pack of 10

The DT4924 Dewalt cobalt drill bit is 8% cobalt which maintains a sharper cutting edge and delivers 4x longer life versus DEWALT Black Oxide bits. The optimised tip and flute geometry delivers 2X the penetration speed, versus DEWALT Black Oxide bits, removes material faster and reduces heat build up. The stronger central core delivers 2X the resistance to breakage versus DEWALT Black Oxide drill bits. Specifications • Diameter: 4mm • Length: 75mm • Working length: 43mm • Pa