1.Base material of 304 stainless steel, high hardness, good anti-damage properties, preventing the door from damage, improves safety performance
2.Achieving the highest four-grade keys control systems through an open cylinder system
3.Adjustment to meet a variety of functions to achieve channel blockage
4.Simple structure, stable operation, high quality but low price.
5.Suitable for door thickness of no less than 35mm
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