Should be ‘equipment’
The prefix pe- and the affix -an are used to form nouns
Peralatan means equipment
The root is alat (noun) which means tool
Other words with this root: mengalati (to equip), memperalat (to use as an instrument)
Equipment cannot be plural.
why not, they need my tools?
I think that's the difference between "alat" and "peralatan", so alat would be any old simple tool, but "peralatan" must be a specialised set of things.
Should be "They need my equipment."