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1.Adopt U type handle to prevent the accident.
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2.Stainless steel crust, never rust.
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3.Adopt metal material for both sides of crust to prevent unsafe hidden trouble of plastic.
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4. No motor inside the mortice: change the deadly disfigurement of motor at all.
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5. Free rotating handle, maximum prolong mechanism life and also avoid unlocking by violence.
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6. Pure stainless steel mechanical rotating structure enable for using more than 10 years.
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7. Change batteries in the lock most easily and safely.
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8. Adopt plastic insulated protection on electronic part
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