Product Details Stove bolts are used to fasten metal parts together that are going into a tapped hole and being held together by a nut. To obtain the fastener length, measure from the underside of the head to the tip of the screw. Stove bolts are nearly identical in form and function to machine screws. UNIVERSAL: Works on all sign materials including plastic, aluminum, cardboard, and vinyl NON-TOXIC AND SAFE FOR KIDS INCLUDES: Wide chisel tip for larger font writing; recap when not in use FOR PROPER USE: Protect surface underneath to avoid ink penetration; not for use on cloth