Easy to hang pictures and frame.
A knock gently, small steel nail fixation, simple and convenient and practical, only leave a bit is
Suits for hard wood and solid walls. Not for stud walls.
Simple to hold photos and body.
A knock lightly, small metal nail fixation, easy and handy and sensible, simplest go away somewhat is
Fits for arduous picket and forged partitions. Now not for stud partitions.
Those hooks have quick hardened metal pins and are simply installed with a hammer.