The Yamini Darham is named after Mahmud's honorific title Yamin-ud-daula (Yamin al-Dawla), which means "the rightful Hand of the State". It is a slightly thick coin, 19.5 mm in diameter, varies in weight from 2.2 grams to 3.7 grams (under Masud III).
Mahmud greatly expanded the Ghaznavid Empire beyond Afghanistan into Pakistan from Sindh to Peshawar, around 1160 A.D. (555 AH), the Ghaznavids are normally believed to have remained confined to the united Punjab Area. Khusrau Malik was the last ruler of the Ghaznavid dynasty. The dynasty ended in 1186 A.D. (586 AH), when it was conquered by Ghorids.