Every repair shop knows the moment when a phone arrives with a micro screw that the last technician already rounded off, and the Qianli 1.0mm Drill Bit Heads 2.35mm (5pcs) exist exactly for that moment and for the other small drilling jobs that come up across a normal working day. Each head carries a 1.0mm working diameter on a 2.35mm shank, which matches the collet size of Qianli grinding pens such as the SG-02 and DM460-K and the wider group of handheld polishing pens built around the same shank standard, so you swap it in the same way you swap a cutting or polishing head and get straight back to work. A stripped cross head on a logic board shield, a screw that seized in the mid-frame after water damage, or a corroded screw holding a charging port bracket all stop disassembly cold, and forcing a screwdriver at that point usually ends with a slipped tip, a scratched board, or a torn flex cable that turns a simple charging issue into a hardware fault. With the 1.0mm drill head, you centre the tip on the damaged screw head, run your pen at its lowest speed setting, and drill only deep enough to relieve the head so the bracket or shield lifts free, and then you remove the remaining screw shank with tweezers once the part comes off. That controlled approach keeps your pressure on the screw rather than on the surrounding components, which matters on crowded modern boards where a capacitor or a trace sits less than a millimetre away from the screw boss. The same tip handles housing and fixture work as well, since you can open small holes in plastic back covers, mid-frame parts, and custom jig plates when you need to route a jumper wire, mount a test point, or adapt a PCB holder for an odd board shape. A 1.0mm hole gives you enough clearance for fine enamelled jumper wire and small test leads without weakening the part around it, and the size suits the tight tolerances you work with on phone internals far better than a general workshop drill bit. Small-diameter drill tips wear and snap much faster than grinding burrs because any side load concentrates on a very thin section of steel, and that explains why this pack gives you five heads instead of one, so a broken tip costs you seconds rather than a trip to the market while a customer waits at the counter. You get the longest life from each head when you let the pen speed do the cutting, keep the pen vertical to the work, avoid levering sideways, and lift out every few seconds so chips clear and the tip stays cool. Metal and plastic debris from drilling can bridge pins and create a short that looks like a dead phone or a boot loop issue after reassembly, so brush the area clean, blow it out with air, and check under your microscope before you reconnect the battery. In the repair workflow, these heads sit at the disassembly and mechanical preparation stage, before board-level diagnosis with a multimeter or test box and before any IC change, reballing, or hot air rework begins, because you cannot fix what you cannot open. They pair naturally with your grinding pen cutting heads for shield removal, polishing heads for pad and edge cleanup, a stable PCB holder that stops the board from moving under the tip, and a stereo microscope that lets you centre the bit precisely on a screw head barely larger than the tip itself. Shops that already keep a set of grinding and cutting heads will find this drill pack fills the one gap those tools leave, and technicians who handle a high volume of water-damaged or previously opened phones will reach for it more often than they expect. If you are still using a basic rotary tool with unstable speed control, upgrading to a dedicated Qianli grinding pen with stable low-speed operation gives these drill heads the controlled rotation they need for clean, centred holes on delicate parts. For Pakistani repair shops looking for the Qianli 1.0mm drill head price in Pakistan alongside reliable stock, this five-piece pack offers a practical, low-cost addition that saves boards, brackets, and repair time every single week.
