Material: HSS4241Color: as the picture shownFeatures:Micro HSS straight shank twist drill electric drill. Twist drill bits metric Hss micro drill bits. Mini Micro HSS Twist Drill Bit Set 0.5mm-3mm ModelingStraight Shank Twist Drill Bit. Infinitely adjustable - secure closure every time. Suit for: PCB, thin aluminum/iron sheet, thin board, plastic suitable for processing small workpieceSpecifications:Shank: straight shank. Size:0.30mm,0.40mm,0.50mm,0.60mm,0.70mm,0.80mm,0.90mm,1.0mm,1.1mm,1.2mm,1.3mm,1.4mm,1.5mm,1.6mm,1.7mm,1.8mm,1.9mm,2.0mm,2.1mm,2.2mm,2.3mm,2.4mm,2.5mm,2.6mm,2.7mm,2.8mm,2.9mm,3.0mmSuitable for PCB, crafts, jewelry, watch makingIdeal for precision crafts and hobby work, recommended with drilll pressQuantity: 28pcs/setNote:Please allow 1-2mm errors due to manual measurementDue to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included:28pcs Rotary Drill Bits Micro Bits Mini Set HSS Metric Sizes 0.3mm-3.0mm