The product's protection rating and TÜV certification indicate that it is intended for interconnection in PV DC strings as described by the manufacturer

insulated crimp ring terminal (Quetschkabelschuh)

the datasheet can be downloaded from Weller: See datasheet from the manufacturer Typical Applications

Overvoltage category / Pollution degree: CATIII/3

Colour coding: Wera "Take it easy" tool-finder system

Spidstang ERGO 60° Glat 130mm Unit(s):Pcs The product's protection rating andProduct Overview These pliers from BAHCO are ERGO 60 bent snipe nose pliers: BAHCO 4833. The product is specified as having an overall length of 130 mm with a 60 bent tip and features for precision and corrosion protection. Design and Materials ERGO 2 component handle with a thermoplastic surface on tough polypropylene for enhanced grip. Manufactured from high performance alloy steel. Surface treatment: phosphated finish with anti corrosion treatment.