General description AlwaysH 150Pcs Kit Twist Drill Bits is a comprehensive set of high-speed steel (HSS) drill bits designed for precision drilling in various materials including wood, metal, plastic, and jewelry. This kit includes 150 pieces with 24 different sizes, ensuring you have the right bit for any project. Technical specifications Material: HSS high-speed steel Sizes included: 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.8mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.8mm, 3.0mm, 3.2mm (10 pieces of each size) Usage Suitable for drilling in wood, resin, jewelry, nuts, amber, beeswax, olive, pearl, PVC, acrylic, and plastic Ideal for woodworking and metalworking projects Other information Comes with a durable and portable plastic storage box for easy organization and transport