Construction Kits A selection of construction kits to suit various requirements including roofers, fall arrest and scaffolders kits. Fall Arrest Blocks A wide range of light, heavyweight and rescue blocks Miller Troll Pioneers in the field of technical access and rescue, Miller-Troll has led the way in the development of state of the art equipment that combines maximum worker protection with excellent freedom of movement and comfort. Duraflex Harnesses Patented Miller Duraflex harnesses feature specially-formulated elastomer webbing that stretches to provide: Greater comfort, Improved safety and Increased productivity - Because Duraflex harnesses are elasticated, the worker has greater mobility with less fatigue. Fall Arrest Equipment A range of high quality fall arrest equipment.