Precise V-Block Set 1-3/8" x 1-3/8" x 1-3/16" 

One reversible swing-away clamp is provided with each V-block.
This versatile clamp, plus the unique offset/hole pattern in the top of the V-block, offers a large variety of the clamping possibilities.
The side slots allow easy clamping to almost any surface.
All V-blocks are parallel, square and centered within .0002"