hello i presente to you a carabiner, not any crabiner a bad one at that tho i dont know i dont have a 3d printer for prototyping.just know thatthere is 5cm or 1/4 of a chese burger roughly between the senteres of each circle and the stress is on the small sircle.i dont realy how ill hold but should be fineish let me know in the comments.bye have good dayPS : this is not rated for safty