Knipex big twin tool case empty 490 x 255 x 410mm knipex 00 21 40 le this big twin tool case from knipex is all about quality manufactured to a high standard and complete with a sturdy design made of black abs material while the surrounding aluminium frame has d rings for placing a carry belt plus permanent mountingother features include a hand friendly carrying handle and holder in the floor for a trolley a 3 part combination lock and 2 tilt locks for fixing the lid a detachab