DIN 894, Special Tool Steel, grey finish.
Return tools for warranty replacement directly to KC Tool. All returns are subject to inspection prior to replacement.
I purchased a 24 and 27 mm wrench of this style. Initially I added them onto my purchase because of the low cost and didn't expect using them. The 27mm is the only one I have used and has been convenient for EGR tubes. The handle is short which allows it to clear tight areas while providing a good striking surface for a hammer.