I have four parts,

One is only a small part,

One hides in the horses mouth,

One turns to open the door,

One in a hole of its own making,

The four together make me,

Alone I eat carefully,

Two of me bite.

What am I?


I'm gonna guess:


Four parts:

A nybble has four bits.

One is only a small part:

A bit is a small part

One hides in the horses mouth:

A bit (connected to/part of the reins) goes in a horses mouth

One turns to open the door:

Looks like a door router bit is part of the hinge system. On further exploration the bit of a key is the part that actually engages the locking mechanism of a lock.

One in a hole of its own making:

If you bit something you would make a hole (tenuous). On further inspection a drill bit is what makes the hole.

Alone I eat carefully:

To nibble is to eat carefully.

Two of me bite:

Two nybbles make a byte.

  • 1
    $\begingroup$ Quick. Want to take a guess at the rest? $\endgroup$ – Brent Hackers Jul 6 '16 at 12:32
  • $\begingroup$ Yep, filling it in now! $\endgroup$ – Arth Jul 6 '16 at 12:32
  • $\begingroup$ +1 marked as correct but there are still two explanation that can be improved. ('One turns to open the door' and 'One in a hole of its own making') $\endgroup$ – Brent Hackers Jul 6 '16 at 12:38
  • 1
    $\begingroup$ @BrentHackers, thought it was those two! Have had another go :) $\endgroup$ – Arth Jul 6 '16 at 12:42
  • 1
    $\begingroup$ Yep. Spot on now. +1 $\endgroup$ – Brent Hackers Jul 6 '16 at 12:44

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