iFixit Aluminum Precision Bit 4mm Driver for Electronics Repair

Standard Size-15mm(length)X15mm(width)X2.5mm(thickness) square straight with 4 edges,30 degree cutting angle. | Most Convenient-If one knife edge is dull or nicked, just turn it to another edge which greatly reduces you down time.and all are of the same sharpness | 10 pieces per box,packed with a plastic container for safe and easy storage | Easy to operate,each blade has 4 sharp edges,if one is dull, just change it to the other side | Carbide cutter Corners are very sharp with virtually no radius Best choice for turning straight profiles and nearly 90 inside corners.