I purchased this about two years ago. I've probably used it about 30 times. I've lost the Allen wrench for locking it, but a standard Allen wrench will work. [Specification improvements and a new black color released in October 2024 / Set up easily as soon as you think of it] Simply fix the pull-up bar to a door frame or wall using the same method as a tension rod, and your home will instantly transform into a home gym. The grip material has been improved and a one-touch lock has been adopted, making it even easier to use than the old model. You can start chin-ups, hanging exercises, and other strength training and workouts the moment you think of it. Recommended as a strength training tool and health equipment for strengthening your back muscles. [Sturdy design with a maximum load capacity of 150kg] This pull-up bar/hanging health device boasts a maximum load capacity of 150kg thanks to its durable 4-layer coated extra-thick pipes and the adoption of non-slip and anti-loosening locks designed based on safety engineering. [Easy-to-understand instructions and videos included] Based on customer feedback, we have improved the instruction manual for the pull-up bar/pull-up machine to make it easier to understand. We also have a strength training video on YouTube that shows you how to install it at a glance. [Thorough protection of door frames and walls] No screws or drilling are required to fix the pull-up bar. Unlike conventional pull-up bars and tension rods, this health equipment uses a large shock-absorbing head on the installation surface, so you can use it without damaging door frames or walls, making it ideal for home strength training. [Ultra-space-saving] This compact pull-up bar is perfect for those who want to use strength training equipment such as pull-up machines and hanging health devices but don't have space. The pull-up bar (chin-up bar) is available in two lengths: short (width 72-90cm) and long (width 90-114cm), so it can be adapted to a variety of spaces and can be stored in small gaps. [Anywhere, for any purpose] You can easily carry it with you on business trips or trips, and you can adjust the height to your liking depending on your height and purpose. If you fix it in a low position, you can also use it as a stretch bar or a leg fixing device for abdominal exercises. For those who find pull-ups difficult, using it as a hanging bar (hanging health device) is also effective. Immediate purchase welcome! We will give priority to those who purchase immediately, even if negotiations are in progress.