Rules for using Escher Cutters in your games of Necromunda can be found in The Aranthian Succession: Cinderak Burning supplement.
This multipart plastic kit builds four Escher Cutters, lightning-fast jetbikes that can be added to any Escher gang. These ferocious flying machines boast a powerful front turbine with exposed engine cylinders, providing thrust for their sleek, bladed chassis. Each Cutter has a deadly gas trap launcher installed on its undercarriage, and sports a pair of mounted weapons on either side of the jetbike – you can choose between twin-linked grenade launchers, twin-linked heavy stubbers, or twin-linked plasma guns. The kit includes a choice of two different head designs and four interchangeable hairstyles, to give each of your Escher riders their own distinct appearance.