AKA just "Demon."
| CP Method: | Rocksim/Rocksim | 
| CP Position From Front: | 22.92 inches | 
| Designer: | Wayne Kellner | 
| Diameter: | 1.33 inches | 
| Main Body Tube: | BT-55 | 
| Main Nose Cone: | BNC-55AM | 
| Manufacturer: | Estes  | 
| Model: | 1258, K-58 | 
| Power: | Low-Power | 
| Product Type: | Kit | 
| Production Years: | 1971-1975 | 
| Recommended Motors: | B14-6, B6-4, C6-5, D12-7 | 
| Recovery: | Parachute | 
| Status: | Out-Of-Production | 
| Style: | Payload | 
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