Glass Knob and Bottle Stopper Inserts and Insert Mandrels

Inserts for making glass knobs for cupboard doors, drawers, boxes and more. These ¼” (6.35mm) outside diameter, stainless steel inserts come in two lengths. The more common ¾” (19mm) length and a shorter ½” (12.7mm) length. Inserts have a hole in only one end and are threaded to accept the included, standard 1” (25.4mm) long, number 8-32 screw. Simply screw an insert onto a 12” (30cm) long stainless steel Insert Mandrel and apply molten glass to the insert.