M8 15mm /5pcs. M4 10mm/20pcs. M10 15mm /5pcs. M6 10mm /20pcs. M6 15mm /15pcs. -Screw-in insert nuts have an external thread and can be screwed in with a hex key wrench. M5 10mm /15pcs. Type: Hex socket screw-in.
eBay