diff --git a/3D Design/joints/pentagon_corner.STL b/3D Design/joints/pentagon_corner.STL new file mode 100644 index 0000000000000000000000000000000000000000..41c1e628cd48a7912aecc3ee7c50135fbafa692d Binary files /dev/null and b/3D Design/joints/pentagon_corner.STL differ