HAZET Safety-Insert-System (SIS) Suitable for HAZET Assistent with drawer dimension of at least 398 x 694 mm: 179 XL ∙ 179 N XL ∙ 179 XXL ∙ 179 N XXL as well as 179 A XXL ∙ 179 T XXL in the upper drawer Perfect order system - all tools are snugly embedded Fast, integrated completeness check – missing tools are noticed immediately Unlimited combination options Suitable for all HAZET tool trolleys Assistent with drawers For tool trolleys Assistent 173, 179 (XL-XXL) and 180, we recommend usage of the soft foam inserts 163-522x40 or 163-522x50