Bitsskrutrekkeren bruker bitssettet.

Because Norwegian usually writes compound nouns as one word.

So:

• bitsskrutrekker = bits
  • skrutrekker
• bitssett = bits
  • sett

This is different from English, where you might often write similar expressions as two words, such as bit screwdriver or bit set.

They mark the nouns as definite, which often corresponds to the in English.

• skrutrekker = a screwdriver

• skrutrekkeren = the screwdriver

• sett = a set
• settet = the set

So:

• bitsskrutrekkeren = the bit screwdriver
• bitssettet = the bit set

In Norwegian, definiteness is very often shown by adding an ending to the noun instead of using a separate word.

Compare:

• en skrutrekker = a screwdriver

• skrutrekkeren = the screwdriver

• et sett = a set
• settet = the set

So Norwegian often puts the at the end of the noun rather than before it.

Because the first part, bits, already ends in s, and the next part starts with s too:

• bits
  • skrutrekker → bitsskrutrekker
• bits
  • sett → bitssett

So the spelling keeps both s sounds. It is not a special grammar ending; it just comes from joining the two parts together.

Bruker is the present tense of å bruke (to use).

• å bruke = to use
• bruker = use / uses / am using / is using, depending on context

In this sentence, it means uses.

A helpful thing for English speakers: the present tense form is the same for all persons:

• jeg bruker = I use / I am using
• du bruker = you use
• han/hun/den bruker = he/she/it uses

It follows the normal Norwegian main-clause pattern:

Subject + Verb + Object

• Bitsskrutrekkeren = subject
• bruker = verb
• bitssettet = object

So the structure is very similar to English:

• The bit screwdriver uses the bit set.

The endings differ because the nouns have different grammatical genders.

• (en) skrutrekker is a common gender noun
  → definite form: skrutrekkeren

• (et) sett is a neuter noun
  → definite form: settet

In compounds, the last part usually decides the gender of the whole word. So:

• en bitsskrutrekker → bitsskrutrekkeren
• et bitssett → bitssettet

You would use the indefinite articles en and et and remove the definite endings:

En bitsskrutrekker bruker et bitssett.

That means A bit screwdriver uses a bit set.

So the original sentence is definite, while this version is indefinite.

Not in a way you need to worry about when reading this sentence. In tool vocabulary, bits- is a very common combining form in compounds such as:

• bitssett
• bitsholder
• bitsskrutrekker

So it is best to learn bits- as the normal compound form referring to screwdriver bits. You do not need to analyze it as an ordinary English-style plural each time you see it.

Yes, bruker can also be a noun meaning user:

• en bruker = a user

But in this sentence it is clearly a verb, because it comes between the subject and the object:

• Bitsskrutrekkeren = subject
• bruker = verb
• bitssettet = object

So here bruker means uses, not user.

Yes, it is grammatically correct Norwegian. The structure is completely normal.

The only thing an English speaker might notice is that the meaning can feel a little technical or unusual, because a screwdriver and a bit set are both tools or tool-related objects. But grammatically, everything is straightforward and natural:

• definite subject
• present-tense verb
• definite object
• standard word order