Handle: 1/4 hexagonal handle (6.35mm)

Material: the drill bit is made of high speed steel 4241 (applicable to workpieces with hardness below 25HRC, such as carbon steel, thin iron plate, insulating plate, PVC plate, wood plate, etc.) The black chamfer is made of carbon steel

Countersunk drill specification                    Corresponding front bit diameter

                      5#                                                                      1.98mm

                      6#                                                                      2.38mm

                      8#                                                                      2.78mm

                     10#                                                                     3.175mm

                     12#                                                                     3.56mm

Function: It can drill the screw hole and the counterbore to accommodate the screw cap at the same time and keep them on the same axis. After screwing in the screw, the screw cap is located below the board plane!

Suitable for drilling machines with collets or joints, suitable for drilling on hard wood and wood layers.