Product Name: Caulking Gun (SG-01) Model NO.: SG-01 Material: metal Type: Cartridge Gun Size: 9" Best Spray Distance: 5mm Spray Width: 1-5mm Weight: 260g Usage: Glass Glue, Decorate Building Materials Delivery: Within 30days Trademark: lockman or as customers Transport Package: in Carton Specification: 9" Origin: Zhejiang, China Product Description Caulking Gun:1. Material: metal2. Size: 9"3. Best spray distance: 5mm4. Spray width: 1-5mm5. Weight: 260g6. Usage: Glass glue, decorate building materials7. Package: In standard export carton8. Delivery: Within 30days9. Competitive price with good quality and serviceFeature:The force is up to 270kg~300kg and save your strength 5 times more than common iron caulking gunBrake ReleasePush the brake handle forward to release the drive rod and to remove the piston pressureCleaning & Maintenance:It is very important to keep the drive rod clean and to oil it frequently in order to ensure a better function.Recover the Movement of the PistonSymptom: Back-lash of the brakeRemedy: Turn the adjusting screw clockwise the whole way down until the drive rod can be moved back and forth.To eliminate the back-lash, which may occur after many operations, follow the instructions below;Turn the adjusting screw counter-clockwise until the drive rod can be exactly moved and forth.