The HSS Co Twist Drill Bit Set by Kendo includes 19 pieces ranging from 1mm to 10mm, suitable for drilling into metal, wood, and PVC. Made from High Speed Steel, these drill bits are durable and designed for heavy-duty use. The set comes in a convenient heavy-duty case for easy storage and transportation. With a gold colour and a compact size, this set is a versatile and essential addition to any DIY enthusiast's workshop.