99Pcs Universal Hss Drill Bit Set Coated Parts Twisted High Speed Steel Power Head Kit Builder Hole Drilling Opener Tip Tool ReplacementFeature:1. Drilling can be easily started without pre-drilling. The drilling speed is fast and the friction is very low.2. It is generally applicable to all kinds of metals, plexiglass and hard plastics.3. It is very suitable for DIY home and general construction and engineering.4. Use with a low-speed electric needle or drill (not applicable hammer drill).5. Application: high speed steel drill bits set of parts for wood, plastic and aluminum. Ideal for DIY, home and general use in construction/engineering. Specification: Material: High Speed SteelPackage Size: 20*19.5*3.5cm/7.9x7.7x1.4inApplication: Drilling holes made of aluminum, iron and other materials. Packing List:16x1.5mm16x2mm15x2.5mm10x3mm10x3.2mm8x3.5mm8x4mm3x4.5mm3x5mm2x5.5mm2x6mm2x6.5mm2x8mm2x10mmNote:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Please allow 1-2cm measuring deviation due to manual measurement.99 x Drill Bits