小号钻头:4mm,6mm,8mm,10mm,12mm
中号钻头:4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm
大号钻头:4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,26mm,28mm,30mm,32mm
适合各种不锈钢与钢板门钻开孔