The HF-JP11K1M4BK is a high-performance servo motor from Mitsubishi's HF Series, designed to deliver precision and reliability in industrial applications. This model features an integrated brake for enhanced safety and operational control. Notably, it includes a keyway for secure mounting; however, it should be noted that it does not come with a key. The HF Series is renowned for its robust construction and efficient performance, making it well-suited for various automation tasks.