The description on the manufacturer's page clearly indicates that the cartridge is intended for the WHA900

The product is specified by DESCO as a pair of ring magnets

Surface: tinned

Marking: Laser-engraved size indications on the blade

Insulation type: PVC (reinforced insulation)

Skævbider ESD High precision Ergo-tek Slim Unit(s):Packet The description on the manufacturer'sHigh Precision Cutters from IDEAL TEK The ES5542. CR. BG is a high precision cutter from IDEAL TEK with a small, tapered, and relieved head geometry and a full flush cutting edge. The product comes with Ergo tek Slim grips and is specified as ESD safe. The description below is based on the manufacturer's official product sheet. Design and materials Blade material: High carbon chromium low alloy steel (100Cr6). Blade hardness: 67 HRC (hardened). Handle