Oil pump hex key

I got new timing belt kit, water pump, serp belt and also requested a new oil pump and hexkey as a precaution. 125kw engine type CFGB 2011 with 378,000kms. Oil change interval average from previous owners 11,000kms, I change it at 8,000kms. I measured the wear on the corners of the hex key, worn area is 1.3mm smaller than centre unworn section. I am delighted to have a new oil pump and hex key. My engine was running perfectly, zero issues. Changing the hex key is for another 350,000kms hopefully. If I didn't, would it round off within 100,000kms..... probably. Sharing the info with you to help fellow owners make an informed decision.