How to Choose a Lock Size & Material
Not sure how to choose the right lock for your needs? Here are some key factors to consider before making a purchase.
What size lock do I need?
- Measure your hole size to determine which shackle diameter will fit inside.
- Measure the length of the area that needs to be clear for your lock to close completely.
What material do I need to have the lock made based on where it is located or my personal preference?
- Steel, Aluminum or Brass are the most common options.
Understanding Lock Types and Their Uses
Locks come in various types, and understanding their purpose can help narrow down your choice. Padlocks, combination locks, and keyed locks all serve different needs. For example, a combination lock works well for gym lockers or toolboxes where key management is inconvenient, while a keyed padlock provides higher security for gates or storage units.
Some locks are weather-resistant, while others are designed for indoor use. Considering how and where the lock will be used ensures you choose a type that meets both functional and security needs. Matching the lock type to the task improves convenience and provides peace of mind that your property is properly protected.
Evaluating Security Features
Beyond size and material, a lock’s security features play a crucial role in protecting your property. Look for features such as hardened shackles, anti-pick mechanisms, and double-bolting systems. For instance, a lock with a boron steel shackle resists cutting, while anti-drill plates prevent tampering. Some locks also offer corrosion-resistant coatings that protect the internal mechanism from rust and wear.
Evaluating these features ensures that your lock not only fits physically but also provides the level of security required for your location. Choosing the right features can prevent unauthorized access and extend the lifespan of the lock in challenging environments.

Considering Environmental Factors
The location of your lock affects the material and type you should select. Outdoor locks must withstand rain, humidity, and temperature changes, while indoor locks are less exposed to these conditions. For example, a marine-grade stainless steel lock is ideal for docks and boats, while brass works well for garden gates.
Environmental factors also include exposure to chemicals or high traffic areas. Picking a lock suited to its environment ensures it functions properly over time. Failing to account for weather, moisture, or frequent handling can cause corrosion, sticking, or breakage, reducing both the effectiveness and lifespan of your lock.
Balancing Convenience and Functionality
A lock should be secure but also easy to use daily. Consider how often it will be opened and who will access it. For example, a heavy-duty steel padlock may be ideal for storage units but cumbersome for a locker that needs daily access. Lightweight aluminum locks are convenient for portable equipment, while combination locks eliminate the need for keys.
Balancing convenience with security ensures the lock meets practical needs without compromising protection. Taking into account usage patterns, accessibility, and user comfort allows you to choose a lock that is both functional and reliable for the intended purpose.
Feel free to email us at sales@1st-in-padlocks.com so we can help you determine the right size of lock for your needs! Pictures with measurements are always appreciated.
