yuri jogageun soneuro jupji malgo sseuregi jipgereul sayonghasipsio.

은 is the topic marker. Here, 유리 조각은 means something like as for glass shards or when it comes to broken glass.

It does not necessarily mean the glass pieces are the grammatical subject in the same way as in English. Instead, it sets up the topic for the instruction that follows.

So the sentence is structured more like:

• As for glass shards, don’t pick them up with your hands; use trash tongs.

Using 은 makes this sound like a general instruction or warning about that category of thing.

유리 means glass, and 조각 means piece, fragment, or shard.

So 유리 조각 means:

• pieces of glass
• glass fragments
• broken glass shards

In Korean, nouns often do not have to show singular vs. plural, so 유리 조각 can refer to a piece of glass or pieces of glass, depending on context. In this kind of warning, it is usually understood generally as broken glass / glass shards.

으로 here marks the means, tool, or method used to do something.

So:

• 손으로 = with your hand / by hand

This particle often translates as:

• with
• by
• using

Compare:

• 펜으로 쓰다 = write with a pen
• 버스로 가다 = go by bus
• 손으로 줍다 = pick up with your hand

So in this sentence, 손으로 줍지 말고 means don’t pick it up with your hand(s).

Because the hand is not the thing being picked up; it is the tool/body part used to do the action.

• 손으로 = with the hand
• 손을 would make hand the direct object, which would not fit here

The thing being picked up is understood from context: the broken glass. Korean often leaves out an object when it is already obvious.

So the sentence does not literally say don’t pick up the hand. It says don’t pick it up by using your hand.

This is a very common pattern:

• -지 말다 = do not do
• -고 = connects to the next clause, often meaning and or instead

So:

• 줍지 말고 = don’t pick it up, and instead...
• more naturally: rather than picking it up...
• or don’t pick it up; instead...

In this sentence, it connects the warning to the recommended action:

• 손으로 줍지 말고 쓰레기 집게를 사용하십시오
• Don’t pick it up with your hands; use trash tongs instead.

So 말고 often has the feeling of not A, but instead B.

The dictionary form is 줍다 = to pick up.

In this grammar pattern, Korean attaches -지 말다 to the verb stem:

• 줍- + 지 말다 → 줍지 말다

So 줍지 말고 is the correct form for don’t pick up, and instead...

You may also know forms like:

• 주워요
• 주웠어요

Those come from different conjugation patterns. Korean verbs can change shape depending on what ending follows. Here, because the ending is -지 말다, the form is 줍지.

쓰레기 집게 means trash tongs, a garbage grabber, or a litter picker, depending on context.

• 쓰레기 = trash / garbage
• 집게 = tongs / pincers / grabber

The particle 를 marks it as the object of 사용하십시오:

• 쓰레기 집게를 사용하십시오
• Please use trash tongs.

So the sentence is telling you what you should use instead of your hands.

사용하십시오 is a formal, polite imperative meaning please use.

This style is common in:

• warning signs
• public notices
• official instructions
• workplace safety language

Compare:

• 쓰세요 = use it / please use it
  
  • polite, everyday speech
• 사용하십시오 = please use
  
  • more formal, official, instructional

Also, 사용하다 is a somewhat formal verb meaning to use, while 쓰다 is the more everyday word for to use.

So this sentence sounds like something you might read on a sign or in a safety manual.

Here it strongly suggests instead.

The pattern A-지 말고 B usually means:

• don’t do A; do B instead
• rather than A, do B

So in this sentence:

• 손으로 줍지 말고 쓰레기 집게를 사용하십시오
• Don’t pick it up with your hands; use trash tongs instead.

If you translate -고 only as and, you miss the contrast. The sentence is not simply listing two actions. It is rejecting one method and recommending another.

Because it is already understood from context: the glass shards.

Korean often omits objects when they are obvious. Since the sentence begins with 유리 조각은, the listener already knows what the instruction is about.

So Korean does not need to repeat something like:

• 유리 조각은 손으로 유리 조각을 줍지 말고...

That would sound repetitive. Instead, the object is left out naturally.

In Korean, body-part nouns are often used in the singular form even when English would naturally use the plural.

So:

• 손으로 can mean with your hand or with your hands
• in this sentence, English would usually translate it as with your hands or by hand

This is very normal in Korean. The singular form often represents the body part in general, not necessarily exactly one.

Yes. That is a very natural English translation.

A very literal breakdown is:

• 유리 조각은 = as for glass shards
• 손으로 = with the hand / by hand
• 줍지 말고 = don’t pick up; instead
• 쓰레기 집게를 사용하십시오 = use trash tongs

Natural English versions include:

• Do not pick up broken glass by hand. Use trash tongs.
• Don’t pick up glass shards with your hands; use a trash grabber instead.
• Please use trash tongs rather than picking up broken glass by hand.

So yes, by hand is an excellent natural rendering of 손으로 here.