These aren't your traditional PTO pins or your other everyday safety pins and forget losing those carter keys ever again with the coated steel cable lanyard. Even though they work Great no problem, we soon realized that there are still trailer hitches including your homemade mobile home, Top shelf and multiple other Trailer manufactures hitches where the pin hole is just too small to fit an ordinary safety pin through. Although with traditional safety pins you have to use two hands to insert and secure the retaining clip, with our safety pins only one hand is needed which free's up the other hand.