Known to the material trade as "BONE FOLDERS or CREASERS" For turning in corners and removing air from under cloth to board adhesion. Five types to choose from starting from the left: #5 x 1" POINTED---# 7 X 1" ANGLED---(#8 X 1" SPEAR STANDARD)---# 8 X 2" SQUARE---# 9.5 x 2.5" GLASS STRAIGHT.
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