We made the NEW LIMITED EDITION Lightwieght series of bolt-on-crampons for fruitboots "Vacuum". They got this name, because - apart from the small weight - several vacuum technological processes were used for their production. Firstly, we used vacuum-arc remelted steel. Secondly, the front of the blank undergoes vacuum annealing, then it is hardened in vacuum. Thirdly, for the frontpoints' coating we used a vacuum deposition of silicon oxide technology.