He was the brother (or possibly just a good friend) of VAINAMOINEN, for whom he forged a SAMPO. This was a magic mill of amazing complexity which included the magic ingredients of a swan’s quill tip, a barren cow’s milk, a barley grain and the wool of one ewe. It was three-sided and could grind corn, money and salt, yet was easily portable.
This gadget was supposed to buy a bride for VAINAMOINEN, but things didn’t work out with the prospective in-laws and they snatched it back. During a chase it got lost at sea, but it still grinds out salt.