K390 VS S90V edge retention testing with a Spyderco Delica and Asher Spiro

Comparing the edge retention of a spyderco delica pocket knife in K390 blade steel and an Asher Spiro in S90V blade steel in a battle of the supersteels using a Bess sharpness tester. #edc #sharp #foldingknife #knifecommunity