The documentation explicitly mentions use on surfaces such as rubber

Manufacturer's type/item number: 57981 (archived as 57981101111 in supplier information)

Model / item number: Wera 05009320001

Hardening: vacuum-ice-hardened (confirmed)

Quantity per package/listing: 100 pcs

Pincet 125mm MIL394101111 The documentation explicitly mentions usePrecision Tweezers from EREM Item No. AASASL is a 5" (5 inch) straight precision tweezer designed for precise work on small components and wires. AASASL is specified as a "5" Straight Fine Robust Tip Precision Tweezer" and is supplied by the manufacturer under the Precision Tweezers product family. Material and Construction The tweezers are made of special steel, which, according to the manufacturer, is non magnetic, non rusting, acid proof, and heat