The file '1-2-3 Block & V-Block Jig Set 3D Printer Model' is (STL,SLDPRT) file type, size is 609.6KB.
1-2-3 blocks (aka setup blocks) are a highly configurable drill press and milling fixture. They are most useful when you need a straight edge or a fixed support surface. Normal 123 blocks are made of hardened steel ground perfectly square and flat. This is intended to be a cost effective & disposable version. (Steel blocks on amazon for comparison: http://amzn.to/28PFOgM)
The block dimensions are 1” x 2” x 3”. The holes (5/16") are used to fasten the blocks to each other or to your table.
Setup blocks go along nicely with step blocks (clamp set): http://www.thingiverse.com/thing:50512
123_block.STL | 673.1KB | |
50-75_block.SLDPRT | 239.3KB | |
50-75_block.STL | 783.2KB | |
Clamp_for_V-block_type_1.STL | 61.2KB | |
V-Block_type_1.STL | 74.9KB |