The 1/4" hexagon drive is specified in the datasheet as Wera Anschluss-Reihe 4 and fits holders according to DIN ISO 1173-F 6

When selecting dimensions

Listed as compatible with models: DXV80

This is directly stated in the manufacturer's product description

Material: polypropylene

Prøveled. 1mm² silicone 1,0m grøn SARK-4N-S10 vinkel/lige 1000V/19A CATIII Unit(s):Pcs The 1/4" hexagon drive isTest Lead: STAUBLI SARK 4N S10 (item no. 66. 1050 *) This test lead from STAUBLI, SARK 4N S10 (item no. 66. 1050 *), is specified as a test accessory according to IEC EN 61010 031. The product is a flexible lead with 4 mm MULTILAM plugs at each end, with one end being in line and the other angled. The lead is designed for electrical measurement connections and features a technically and neutrally described construction type without additional