Overall, poor condition, but good parts machine or wi... Jefferson City, MO, USA. Click to Request Price. HD712 Drifter for HCR1200ED HYDRAULIC ROCK DRILL 580000. USED. Manufacturer: ; Model: HCR1200ED; HD712 Drifter used on a 1200EDII and had approximately 4786 total impact hours on it prior to its complete reseal. .