TAPERED DRILL SET - 3 PIECES TITANIUM-COATED BEARING STEEL - These durable drill bits are made of high-speed, resistant, and durable titanium-coated bearing steel, making them ideal for drilling holes in PVC, thin-walled sheet metal, and even metal. Pre-drilling is not required. CLEAR NUMBERING – The drill bits are graduated, with each one numbered. The numbering is perfectly legible, allowing you to easily drill a hole of your desired width . ONE DRILL FOR MULTIPLE HOLES – Tapered drill bits are shaped like a Christmas tree or interconnected metal discs of increasing diameter. Thanks to the many different steps on the drill bit, it's possible to drill holes of varying diameters with a single drill bit. CONVENIENT CASE – The set comes in a practical case that makes storing the drill bits much easier and is also convenient for transport. When stored in the case, the drill bits don't bump into each other or get damaged. SPECIFICATION material: titanium-coated bearing steel shank: 6mm drill sizes: 4 - 12mm - 4; 6; 8; 10; 12 4 - 20mm - 4; 6; 8; 10; 12; 18;20 4 - 32mm - 4; 6; 8; 10; 12; 14; 16; 18; 20; 22; 24; 26; 28; 30; 32 set weight: 229 g weight in packaging: 232 g INCLUDED 3 x step drill bits case