The clamping bores of the two-way connector clamps GN 135 are not machined and specially designed for construction tubings GN 990 or DIN 2391, DIN 2395 and DIN 2462 respectively.
The square designs are also suitable for use in profile systems.
The bore holes and squares must be put together such that an adaptation between between different tube cross-sections is possible.
The standard clamping screws are socket cap screws DIN 912. They can be replaced by adjustable clamping kits GN 911 (article code see table of dimensions).