Card File Boxes and Follow Blocks
SuccessImage carries a large number of sizes of index card files including those for 3x5, 4x6 and 5x8 index cards. Each size is also available in four depths - 3, 6, 9 and 12 inches.
The 9 inch and 12 inch sizes are fitted with follow blocks that can be placed anywhere in the length of the card file.
The follow block has a release lever behind the block (not really a block, but rather a metal plate). When this lever is squeezed together with the block, much like a clothes-pin, it is free to move forward and back along the rod. When released, the spring mechanism locks the block in place. This allows any number of cards to be placed in the card file box and remain standing upright. Note that only the 9 inch and 12 inch long boxes are equipped with this mechanism.
The 9 inch and 12 inch sizes are fitted with follow blocks that can be placed anywhere in the length of the card file.
The follow block has a release lever behind the block (not really a block, but rather a metal plate). When this lever is squeezed together with the block, much like a clothes-pin, it is free to move forward and back along the rod. When released, the spring mechanism locks the block in place. This allows any number of cards to be placed in the card file box and remain standing upright. Note that only the 9 inch and 12 inch long boxes are equipped with this mechanism.

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