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. Once placed, these anchors provide a safe, reliable and long lasting fixing.
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 ior exploration and sport caving rigging.