Hole Size Compatibility Checker
Check compatibility between your existing door holes and smart lock requirements. Get precise drilling recommendations and modification guidance.
Precise Compatibility
Drilling Guide
Modification Planning
Hole Configuration
Diameter of existing lock cylinder hole
Diameter of existing deadbolt hole (if applicable)
Actual door thickness measurement
Compatibility Analysis
Compatible
Hole Compatibility Status
Cylinder Hole Perfect
Deadbolt Hole Perfect
Modification None
Difficulty Easy
Hole Size Comparison
Drilling Requirements
Modification Steps
Recommended Tools
Drilling Guidelines
Hole Size Standards
Standard cylinder holes are 22mm for deadbolts and 32mm for door knobs. Smart locks may require specific sizes - always check manufacturer specifications.
Drilling Techniques
Use proper hole saws and drill bits for clean cuts. Start with pilot holes, drill from both sides to prevent splintering, and use backing boards for support.
Safety Considerations
Always wear safety equipment, secure the door properly, and consider professional installation for expensive doors or complex modifications.