What is a Pinning Kit?

A pinning kit is a locksmith tool set used to rekey, repin, or build lock cylinders by supplying the individual pins needed inside a pin tumbler lock. A pinning kit typically includes bottom pins, top pins (drivers), and springs in a range of sizes, organized in a labeled case or pinning mat so a locksmith can quickly select the correct pin length for each chamber. Pinning kits are a core part of any locksmith's rekeying toolkit and are used across residential, commercial, and master key system work.

Types of Pinning Kits

Pinning kits come in several formats depending on the scope of work and lock brands serviced:

• Universal pinning kits – cover common pin sizes used across major residential lock brands such as Kwikset and Schlage

• Brand-specific pinning kits – matched to a single manufacturer's pin specifications for precise compatibility

• Commercial/SFIC pinning kits – include control pins and top pins sized for interchangeable core (IC) systems used in master keying

• Bulk pin refill kits – larger quantities of individual pin sizes for high-volume locksmiths who rekey frequently

• Compact/mobile pinning kits – smaller cases designed for locksmiths working service calls in the field

How to Use a Pinning Kit

Using a pinning kit follows a consistent rekeying process:

1. Remove the lock cylinder and extract the plug using a plug follower

2. Take out the existing pins and springs from each chamber

3. Insert the new key into the plug to confirm alignment

4. Use a key gauge or pin chart to determine the correct bottom pin size for each chamber

5. Load the correct bottom pin, then the matching top pin, into each chamber

6. Insert the springs and reassemble the cylinder into the lock

A pinning mat is commonly used alongside the kit to keep pins organized by chamber and prevent losing small components during the process.

What is a Pinning Kit Used For?

A pinning kit is used primarily for lock rekeying — changing a lock's pin configuration so it works with a new key while the old key no longer functions. It's also used for:

• Building master key systems across multiple doors

• Repairing worn or damaged pins inside an existing lock

• Servicing SFIC and IC cores for commercial clients

• Restoring older locks to working condition without full hardware replacement

How Does a Pinning Kit Work?

A pinning kit works by supplying pins in incremental sizes that correspond to the cuts on a key. Each chamber in a lock cylinder holds a bottom pin (matched to a specific cut depth) and a top pin, separated by a spring that keeps constant pressure on the stack. When the correct key is inserted, every bottom pin rises to align precisely at the shear line, allowing the plug to rotate and the lock to open. A pinning kit gives locksmiths access to the full range of pin sizes needed to set that alignment for any key combination.

What Are the Common Uses of Pinning Kits?

Pinning kits are most commonly used by:

• Residential locksmiths rekeying homes after a move-in or lost key

• Commercial locksmiths managing master key systems for offices and multi-tenant buildings

• Property managers standardizing keys across multiple units

• Mobile locksmiths performing on-site rekeying during service calls

• Locksmith training programs teaching pin tumbler mechanics

Main Characteristics of Pinning Kits

• Organized by pin length for fast identification

• Include multiple pin types: bottom pins, top pins/drivers, and springs

• Often color-coded or numbered to match pin size charts

• Compatible with specific keyways or offered as universal sets

• Compact, durable cases suited for shop or field use

Advantages of Pinning Kits

• Cost-effective – rekeying is significantly cheaper than replacing lock hardware

• Fast turnaround – a trained locksmith can rekey a standard lock in minutes

• Supports master keying – enables organized, multi-level access systems

• Reusable investment – a single kit services hundreds of rekeying jobs

• Precision – accurate pin sizing ensures reliable, long-lasting lock function