Mandrels are made of stainless steel and have a very low heat transfer. This means your fingers will stay cool even while you're working in a direct open flame. Use the bead rake to manipulate molten glass by dragging, raking, feathering, or swirling the surface. You can also create air bubbles or poke holes through the glass. A bent tip provides a more comfortable grip. 12 mandrels in package Mandrel Length: 10" Mandrel Diameter: 3/32" Bead Rake Length: 7 1/2"