Thermo-Loc is a special reusable polymer material that is rigid at room temperature yet becomes pliable when heated or warmed. Developed to hold irregularly shaped or fragile items, Thermo-Loc can be used on firearms, knives, wood, and more. Just follow these basic steps: heat, form, and hold.Supplied in convenient 6″ (150 mm) long sticks, Thermo-Loc is a medium gray color designed to reduce eye strain under work lights. It is non-toxic and biodegradable.Includes 6″ (152.4 mm) square special non-stick PTFE material pad for microwave use and 1 pound of Thermo-Loc.(1 lb = approx. 60 sticks).• Rigid at room temperature yet becomes pliable when heated or warmed• Developed to hold irregularly shaped or fragile items• Medium gray color is designed to reduce eye strain under work lights• Non-toxic and biodegradable