Cover Buttons - 1/2" (SIZE 20) - FLAT BACKS - QTY 150 SIZE 20 (1/2" - 12mm) COVER BUTTONS FLAT BACKS 150 SETS (SHELL AND FLAT BACKS) TOOL IS NOT INCLUDED, BUT IS REQUIRED IN ORDER TO ASSEMBLE COVER BUTTONS SEE OUR OTHER LISTINGS FOR ASSEMBLY TOOL WE WILL ALSO INCLUDE A PAPER TEMPLATE