You searched for "triangular insert"
Facom
Facom 12 Series Polygon Drive, 9 mm, 9 x 12mm Insert
Part: 12.9
Facom polygon drive socket insert for general fastening and maintenance.
Facom
Facom Spanner Head, 9 mm, 9 x 12mm Insert
Part: 10.9
Small spanner head insert for modular socket and wrench assembly systems.
Gedore
Gedore 7112 Series Spanner Head, 9 mm, 9 x 12mm Insert, Chrome Finish
Part: 7679050
Chrome spanner head for wrench assembly and general mechanical fastening work.
STAHLWILLE
STAHLWILLE 540 Series Crow Foot Spanner Head, 9 mm, 1/4in Insert, Chrome Finish
Part: 01200009
9mm crow foot spanner for confined space fastening.