Rockler Woodworking and Hardware has added two new sizes, 6″ x 8″ and 6″ x 13″ to their I-Semble™ Shelf Blocks, a component designed to help DIYers design and build custom furniture using common household tools. The I-Semble Shelf Blocks have a black powder coat finish which can be painted to match decor and are designed so multiple sizes can be used in the same furniture piece. Mounting screws to install the I-Semble Shelf Blocks are included in the package. They are sold in packs of two, with the 6″x8″ Shelf Blocks (item 49157) priced at $16.99 per pack and the 6″ x 13″ Shelf Blocks (item 48832) priced at $18.99 per pack.