BB Micro Drill Bit Shank D=4mm BF2055 Corner Radius it achieves significantly enhanced hardness

it achieves significantly enhanced hardness and delivers exceptional wear resistance for demanding applications

5 D20 45  100  3T 20R1

please pay attention to the strength and drilling angle to prevent damage to the drill bit model

SP06 is SPMG06

5 D12 40  100  3T 12R1

BB Micro Drill Bit Shank D=4mm BF2055 Corner Radius it achieves significantly enhanced hardnessBB Mirco Drill 1PCS The whole bit is made of Solid Carbide, which makes the bit more durable. But it also makes it easier to break, so it's forbidden to use electric hand drills and unstable machining environments. Application Steel, stainless steel, cast iron, die steel, circuit board,acrylic and so on. Diameter of shank : 3mm or 4mm Recommended Cutting Conditions *Reference parameters are used as the general standard and need to be adjusted