Rock Driller REFILL Kit Safe For Kids And Fun To Use! Exclusive Safety Dome Protects Small Fingers Make Beads For Decoration and Jewelry! Make Your Own Jewelry Drilling Rock Shells etc. This is a Refill Kit for the Elenco Rock Driller Drill rock and shells for your own collection or make crafts or jewelry for your family and friends. Just drill your favorite stones and let your imagination run wild!. 3 Key chains. 12 Jump ring connectors. 1 18" silver tone necklace chain. 1 18" black leather-like cord necklace. 3 pairs hanging earring wires. 1 Drill bit. Glue.