Stainless steel tools integrate metal hardening technology Wera Tools' stainless steel fastening tools were designed to offer a solution to rust and corrosion. A cryogenic tempering process gives tools the proper hardness and flexibility for shop floor use. The stainless tools also feature a unique Kraftform handle, meant to feel custom-fitted to the hand. In addition, a micro-rough Lasertip drive ends ensures that cam outs are a thing of the past. The line includes screwdrivers, screwdriver insert bits, quick release bit-holders and hex keys to meet all fastening needs.