Innovative system & industry solutions for planners and architects Connecting Systems Modern and easy-to-use technologies for fast and effective assembly of precast elements. product overview BT-Spannschloss® The BT-Spannschloss® (turnbuckle) is part of an easy-to-use connection system - without any further additional materials or aids. product page ThermoPin® The ThermoPin® is a composite anchor made of glass fibre reinforced plastic (GRP) for sandwich walls and core-insulated double walls. product page