Wedge coil pen features Agion's environmentally friendly fraud-resistant ink that helps prevent tampering of checks and documents. Black security ink writes easily on thermal paper. Telephone-type coil extends to more than 5' and coils back to less than 6". Scabbard base mounts vertically, horizontally and diagonally to telephones, refrigerators, partitions and walls. Wedge coil pen uses standard refills.