General description Faithfull HSS 19 Piece Drill Bit Set is designed for multi-material drilling, featuring high-quality roll forged flute twist drills. These bits are made from HSS with a black oxide coating and manufactured in accordance with the DIN338 standard. They are suitable for drilling in alloy steels, carbon steels, hardened alloy steel, plastic, timber, chipboard, and plywood. The set is supplied in a robust plastic case that secures and protects the drills, with a transparent flip action lid for easy viewing of the contents. Technical specifications Material: HSS (High-Speed Steel) Coating: Black oxide Sizes: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm Usage Recommended for use with a cutting lubricant. Ideal for drilling in various materials including metal, plastic, timber, chipboard, and plywood.