General description The 1/2-20UNF Keyless Drill Chuck is designed for versatility and ease of use, accommodating a wide range of drill bits from 2 to 13 mm (0.04 to 0.51 inches). Its keyless and self-tightening mechanism enhances user experience by providing a secure grip on the drill bit, ensuring it remains firmly in place during operation. Technical specifications Collet size range: 2 to 13 mm / 0.04 to 0.51 inches Diameter: 43 mm / 1.69 inches Length: 71 mm / 2.8 inches Drive Size: 1/2-20UNF Usage Durable and long-lasting, suitable for extended use Easy to install and disassemble, making it practical and labor-saving Other information Features a good metallic texture and a comfortable coating surface Enhanced toughness and structural strength due to heat treatment Unique design converts torque into stronger clamping force