Need to smooth or enlarge a hole with precision? This 13mm hand reamer is a workshop essential. Made from tough 9Crsi alloy tool steel, it's built to last and reaches H8 accuracy – meaning it creates very precise, smooth holes. It has 6 straight flutes that cleanly remove thin layers of metal. The bottom is chamfered for easy alignment. Overall length is 135mm (about 5.3 inches), with a 72mm flute length and a 10mm square shank so you can turn it with a wrench. Use it for finishing holes in aluminum, cast iron, copper, plastic, etc. Great for DIY projects, machining, or repair work where you need a clean, round hole with low surface roughness. Always use with a bit of machine oil for best results and long life. Simple, reliable, and professional-grade for hobbyists and pros alike.