57 Pieces Mini Precision Drill Bit Pin Drill Bit Milling Cutter Mini Drill Bit Model Making Wood Drill Bit Precision Pin Screw Hand Drill Tools Drill Bit Milling Cutter Twist 0.3-3mm, PCB 0.1mm-1mm

total of 57 pieces: including a 1-pin electric drill bit + 46 micro twist drill bits + 10 mini PCB electric drill bits to allow you to do DIY projects by hand. PCB Micro Drill Bit: The PCB micro drill bit is made of tungsten carbide, suitable for processing PCBs, standard FR 4 boards, EMC-3 boards, SMT, CNC machines, molds, plastics, printed circuit boards, carbon fiber, composite boards, etc. Micro Twist Drill Bit: The micro twist drill bit is lightweight and compact. It doesn't take up extra space. It is used for processing wood, plastic, rubber, PVC, walnut, model making, bone, angle steel, amber, olive, fiberglass, and other materials. Hand drill with tau pin: aluminum alloy, strong and durable, its shank can be rotated, sturdy and easy to use