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Deadbolt. Product parameters. Name: Door and window limit lock. Material: stainless steel manganese steel. Features: No drilling installation, thickened material, free fixing, limit ventilation, a variety of styles. Thickened screw, strong and durable, not easy to deformation. Wide range of spacing adjustment, adjustable from 8-51mm. Opening and closing mode: key selection opening and closing. Scope of application: aluminium alloy sliding windows. Applicable window gaps: Hexagonal window locks are suitable for most home sliding windows. Description. Product name: Door and window limit lock. Specification. Product material: stainless steel manganese steel. Product type: One-way lock/hexagonal lock/dual hole window lock/single hole window lock. Opening and closing mode: key rotation opening and closing. Product features: no drilling installation, thickened material, free fixing, limit ventilation, a variety of styles, to prevent falling, simple installation, durable, etc. Scope of use: a