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The expanding collar is a new design and has greatly improved on the previous version.
The design phase focused on creating a technology which ensures expansion on an increased number of surfaces.
Our tests show that this objective has been achieved.
Attention: On particularly soft rocks (such as sandstone) all expansion bolts - including our own - are not recommended due to the unreliable nature of the supporting material.
In these circumstances we recommend the use of fixed resin anchors (epoxy glue resin) or Multi-Monti screw anchors.
Very popular in the creation of ground-up routes.
Short type (M10x66) with one expanding collar (new type).