Check the listing for details. Manual Slack Adjuster World American WAKN44041. Condition: New. Listed at 22.81 USD. Manual Slack Adjuster World American WAKN44041 Free Shipping Thanks for choosing us! Check back soon – we always add new and unique items to our store. This manual slack adjustor is a top-quality product from World American, designed to ensure your commercial truck's optimal performance. It is specifically designed for use with brakes and brake parts, and is compatible with a wide range of commercial truck models. Crafted with precision and attention to detail, this slack adjustor is designed to provide reliable and long-lasting performance. It is easy to install and adjust, making it an ideal choice for truck maintenance professionals. With its high-quality construction and superior design, this manual slack adjustor is a must-have for any commercial truck owner.