Yes, it is a knife used for ceremonial tools and/or daily tools (we like to use tools modern tools made in china nowadays
). The blade declares the 4th stage in life, oldness, where keris represents 3 stages of life. The owner must give away their keris before given this blade as a symbol that they must leave behind worldly life and start focus spiritual life. I think mine is 2 edges sharp, perhaps it is other interpretation.
Javanese also have this kind of blade called bethak, but I don't know if it has the same purpose.
~Hing ngarsa sung tuladha, hing madya mangun karsa, tut wuri handayani