ITEM NAME:50pcs 1.0-3.0mm Round Handle HSS Twist Drill Woodworking Drill Bit Set Tool #gib Store Home Promotion Hot Item Add to Fav.HSS material is suitable for drilling holes on angle iron, wood, plastic, aluminum alloy and other materials. 50pcs specification: 1.0mmx10, 1.5mmx10, 2.0mmx10, 2.5mmx10, 3.0mmx10. The straight shank twist drill is mainly composed of a handle and a working part.