[rú bì shǐ zhǐ]   

如    臂    使    指    像胳膊支配手指那样。比喻指挥如意，没有牵制。 褒义>

比喻指挥如意，没有牵制。

As the arm directing the fingers -- command with ease as one wishes

如鲠在喉    如出一口    如梦如醉    如运诸掌    如花似玉