This is a one piece carabiner. Ready to use right after printing. There are interlocking features to ensure that the carabiner doesn't easily come apart, whether you are pulling, pushing or twisting. Because this carabiner doesn't have zig-zag profile and majority of it is solid and straight, it's supposed to take more load compared to some other types of the carabiner. I used it lifting 40 lbs stuff without any problem. However, please consider this a toy and do not use it for any safety related applications. Thanks and Enjoy!