Draper Metric Hexagon Key, 17mm

Amazon

Manufactured from hardened and tempered chrome vanadium steel with chemically blacked protective finish and chamfered ends Easy access to socket head cap screws Chemically blacked protective finish and chamfered ends Provide more swivel room for each wrench Reaches to awkward angles that regular hex keys can't reach, Weight: 0.4629707502 pounds, Manufacturer: Draper

ManoMano

Manufactured from chrome vanadium steel that’s hardened and tempered then applied with a chemically blacked protective finish and chamfered ends This is a Draper product.

Electrical World

Manufactured from chrome vanadium steel that's hardened and tempered then applied with a chemically blacked protective finish and chamfered ends.