The product identity and primary function — a non-insulated cable lug for crimp connection — is evident from the manufacturer's product information from Intercable Tools

Type: Low-voltage cylindrical fuse

3-drive og giver en præcis sekskantsoverførsel mellem værktøjsdrevet og skruens hoved

and access in fixed mounting conditions

T0054486399)

Prøvepind Grip-Di f/sikring sort 1000V - CAT III max 16A MIL357101111 The product identity and primary. Steel jaws especially for connections to ground rails and thick cables. For increased safety when making connections, the jaws are insulated on the outside. 4 mm rigid socket in handle accepting spring loaded 4 mm plugs with rigid insulating sleeve. Transparent fuse holder sleeve to accept a high rating fuse 10 mm x 38 mm. The fuse is not supplied.