Which everyday tool best illustrates a couple?

1. A couple is two equal, opposite, parallel forces acting at different points. 2. The two forces together produce pure rotation without translation. 3. Turning a tap uses two fingers applying equal and opposite forces on opposite sides. 4. Hence rotating a water tap is the standard example of a couple. _Source: Selina Concise Physics ICSE Class 10, Ch 1 'Force' (icsehelp.com chapter extract)_