an easy grabbing point?

[Saneta]

English Grammar Tests, Elementary Level

ESL/EFL Test #291 "Household Items (1)", question 10

A person turns a door ......... when he/she opens a door. This item makes for an easy grabbing point when someone wants to open or close a door.

(a) ball
(b) hitch
(c) knob
(d) nozzle

English Grammar Tests, Elementary Level

ESL/EFL Test #291 "Household Items (1)", answer 10

A person turns a door knob when he/she opens a door. This item makes for an easy grabbing point when someone wants to open or close a door.

Correct answer: (c) knob

Your answer was: correct
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please explain: grabbing point?
thanks! :-)

[Our Tort System]

A grabbing point is a point that you grab with your hand(s).
A door knob is an easy grabbing point because of its shape.
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If it's not easy, don't do it!
That's how I got where I am.