The side handle grip is not tightened securely.
- Loosen the side handle grip until the hooks are wide enough to fit into the slots on the gear case ring.
- Position the handle on top, pointing left or right.
- Tighten the side handle grip until it is secure. Ensure it is tight before each use.
If that didn't work, check the hooks and slots for damage or debris. Clean them. The handle must be installed correctly in the slots; it cannot be attached elsewhere on the tool.
Heads up: You must always use the side handle when operating this drill. Always brace or hold the tool securely to reduce the risk of injury.