10PCS 3.1-4mm Hard Alloy Bit Micro Drill Bits Set Straight Shank Twist Drill for Circuit Board

1、The alloy drill bit is not easy to corrode but because the bit is too thin and easy to break please be careful when using it. 2、Straight shank twist drills can obtain greater drilling capacity under the same torsion. 3、The drill bit applied to the circuit board and suitable for most working environments. 4、10Pcs drill bits can meet your use and replacement needs very practically. 5、It has the characteristics of precise positioning and fast cutting and strong chip removal ability.