Square U-Shape 400x400 (sides 400 mm), for working with superstructures and heavy work pieces. Riser Blocks are firmly screwed by using connector bolts (Item No. 280560.N).

When used as a table extension exceeding 1000 mm, the Riser Block
has to be supported by a table leg.

Combined with the legs (Item No. 280371), Riser Blocks can be flexibly used on the foundation rails.

A multitude of clamping- and connection options, using different Riser Blocks and Stops, are facilitated by the five-sided boreholes and the optional diagonal hole arrangement.

Grid lines with a 100 mm spacing make orientation easier.

From a length of 500 mm all U-shaped squares have mounting holes on the back to attach table legs (except 280310.P).

Diagonal grid upon request.