The numbers inside this brick are 01 B02. The brick is a 1 x 1 black plate with a white clip inserted into a hole. I have searched BrickLink with no success. I have also searched Google. Hoping someone from here can help.
Hey there Treppy!
This is Part #93062c01 Leg Skeleton with Black Square Foot.
Ya see, even the Skeletons know stepping on a LEGO bare boned is a no no!