What are "ha'Kelim"?
Malbim: They are musical instruments.
What are "Kol Klei ha'Kodesh"?
Malbim: [They oversee people who make] the Paroches and Bigdei Kehunah. Shekalim 5:1 lists 15 appointees 1 .
The last two are over the Paroches and garments. (PF)