ProLinea Spy Holes and Extension Plugs

• Designed to complement the Mila Supa door knocker range for a coordinated, premium look.
• Available in 160° and 180° viewing options to suit different visibility requirements.
• 10mm and 20mm extension plugs available, ideal for wider or bespoke door constructions.
• Suitable for door thicknesses 20–34mm and 35–55mm.
• Offered in a wide range of colour finishes, to complement the existing Mila Supa^™ hardware range.
• Corrosion tested to 96 hours NSST (Neutral Salt Spray Test) for proven durability and long-term performance.

Show more

• Polished Chrome

• Brushed Satin Chrome

• Polished Gold

• Black

• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 

1 of 16