CARBON STEELThe rivet nuts are made of carbon steel and zinc plated, sturdy and durable.. NULTI APPLICABLE MATERIALSCan be easily installed in many different kinds of material including steel, plastic and fiberglass.. KNURLED DESIGNThe knurled nut makes it easier to insert into the work piece.. UTILITY TOOLGreat rivet nut installation tools to make work easier and quickly.. WITH STORAGE BOXComes with a plastic organizer box for storage..
