250-404 CA #4 Quick Change Heavy Duty Boring Bar Tool Post Holder. Upgrade your lathe’s capabilities with this premium aftermarket 250-404 CA #4 Quick Change Heavy Duty Boring Bar Tool Post Holder. Designed for stability and precision, this high-quality holder allows for rapid tool changes and secure clamping, ensuring consistent performance during demanding machining tasks. This is a durable aftermarket component built to provide a reliable fit and long-lasting service for your shop equipment. Key Features & Benefits. Heavy-duty construction for maximum rigidity and reduced vibration during deep boring operations. Quick-change design saves time and increases productivity by allowing fast swaps between tools. Precision-machined to ensure accurate alignment and repeatable results. High-grade materials for enhanced wear resistance and durability in professional environments. Easy-to-adjust height settings for optimal tool positioning. Compatible with standard CA series quick change tool posts. Fits various industrial and bench lathes requiring a #4 boring bar holder. Suitable for use with a wide range of boring bar sizes within the CA specification. Holder Type: Heavy Duty Boring Bar Holder. Compatibility: #4 Quick Change Tool Posts. Is this an OEM part? No, this is a high-quality aftermarket part designed to meet or exceed the performance of the original equipment. How do I confirm compatibility? To confirm fitment, please verify that your current tool post is a CA series and check that the 250-404 model number matches your equipment requirements. You can also consult your machine’s manual or measure your existing holders for comparison. Brand names and model numbers are used for reference purposes only. Compatibility may vary depending on the machine’s serial number.