Numeral + 手 + Noun
The classifier 手 (shǒu) means "hand" and is used as a measure word to classify items that are held in the hand. It appears in phrases like 一手枪 (a handful / a hand of guns), emphasizing what someone is holding.
他一手拿着手机,一手拿着咖啡。
tā yī shǒu ná zhe shǒujī, yī shǒu ná zhe kāfēi.
He held a phone in one hand and a coffee in the other.
她手里拿着一手好牌,笑了起来。
tā shǒu lǐ ná zhe yī shǒu hǎo pái, xiào le qǐlái.
She had a great hand of cards and started to smile.
他一手提着行李箱走出了车站。
tā yī shǒu tí zhe xíngli xiāng zǒu chū le chēzhàn.
He walked out of the station carrying a suitcase in one hand.