Material: This ER-32 Collet Chucks Block Square and Hex is made of tool steel. After a certain heat treatment and cold drawing hardening process, the strength is relatively high. These collet blocks have excellent wear resistance and high Hardness and high precision. Easy to Operate: Lathe collet chuck is easy to install quickly on milling machines, lathes, surface grinders and drilling machines due to its high precision. The performance is excellent and stable to provide you with a simple operation experience. Professional Tools: ER-32 Collet Chucks Block can be used to drill parallel, square or hexagonal and 60°, 90° or 120° cross holes. The accuracy of parallelism, perpendicularity and flatness is within ±0.0005 inches, ensuring reliability and parallelism. Complete Kit: You will get a professional and complete router collets chuck kit, including 1 hexagonal chuck or 1 square chuck or set of both as per your order. The chuck chuck seat is specially designed for CNC lathe tools and engraving machines, which is very suitable for processing long parts.