Emiif Stainless Steel Hole Opener, Metal Sheet Hole Expander 16-200mm, Drill Bit Set for Door Viewer Installation, Compatible with 40-65mm Thick Doors (16mm)

Product Features

• Stainless Steel Hole Opener: Expand holes from 16mm to 200mm with precision using this LONG LASTING metal sheet hole expander made of stainless steel; includes 16mm, 17mm, 18mm, 19mm, and 20mm drill bits for versatile drilling needs on doors or metal surfaces up to 65mm thick.
• Multi-Size Compatibility: Designed for general use across various door thicknesses (40-65mm / 1.57-2.36inch), this hole opener set insures accurate alignment and secure fit; ideal for installing door viewers requiring a 0.63inch diameter entry point.
• Easy Installation Process: Each drill bit features a quick-connect design that simplifies setup—drill the designated hole, insert the viewer, then hand-tighten both sides together securely; no additional tools required for standard mounting tasks.
• Precision Engineering Mechanism: Utilizes a tapered cutting edge with reinforced flute structure to deliver clean, burr-free openings in metal sheets; engineered for consistent performance and reduced material stress during expansion.
• Clear Visibility Outcome: After installation, achieve wide-angle sightlines through your door viewer for improved awareness of exterior activity; slight color variation may occur due to lighting and screen settings as per actual measurement conditions.