3D Design: It is a wide variety, but not commonly used. Of the three-dimensional designs, three-dimensional models are mainly computer animation, industrial or architectural design projects.
I laid the leash case flat up for grabs while using screws facing up. I started to look at screws away from leash case, after which I took a smaller flat head screwdriver to pry the two pieces apart while trying to not damage the plastic case. Then gently lifting the pried off part of the case which doesn't hold the mechanism and hang it aside while using two screws.