LEGO Medium Stone Gray Hinge Brick 1 x 2 Locking with Dual Finger on End Horizontal (30540 / 54672)

LEGO Medium Stone Gray Hinge Brick 1 x 2 Locking with Dual Finger on End Horizontal has been used in at least 32 LEGO sets over the past 20 years, since it was first used in 2004. You can also find this part in at least 16 other colors. It has the design IDs 30540, 54672 which can usually be found molded into the bottom of the part.