- For DOWNWARD-OPENING FLAP DOOR used with piano, butt or drop hinges (SDH-001, SDH-P, P.238
- HDS-10 is designed to hold door in closed and opened position
- Used in pairs
- Torque Calculation: Torque = Door Height × 1/2 × Door Weight
K-Type (Light Duty): 140~200 kg·cm (121~173 lbs·inch)/pair
M-Type (Medium Duty): 200~250 kg·cm (173~216 lbs·inch)/pair
H-Type (Heavy Duty): 250~300 kg·cm (216~260 lbs·inch)/pair