What is a Lock Pick Gun?

A lock pick gun (also called a pick gun or snap gun) is a locksmith tool designed to open pin tumbler locks quickly by transferring a sharp impact into the lock's pins instead of manually picking each one. When the trigger is pulled, a thin needle strikes the bottom pins, momentarily bouncing the top pins across the shear line while a tension wrench holds slight rotational pressure — allowing the plug to turn and the lock to open.

Pick guns are widely used by professional locksmiths for fast, non-destructive lockouts on residential and light commercial pin tumbler locks, and are a staple tool alongside lock picks, tension wrenches, and plug spinners in a locksmith's kit.

How Does a Lock Pick Gun Work?

A lock pick gun works by using kinetic energy transfer rather than manual pin manipulation:

• The thin needle tip is inserted into the keyway, resting beneath the bottom pins.

• A tension wrench is applied to the bottom of the keyway, holding light rotational pressure on the plug.

• Pulling the trigger snaps the needle upward, striking the bottom pins in a short, sharp motion.

• The impact transfers energy to the top pins, causing them to jump above the shear line for a fraction of a second.

• While the top pins are separated, the tension wrench rotates the plug slightly, allowing the pins to set at the shear line.

• Repeated trigger pulls gradually set each pin stack until the lock opens.

This process relies on the same shear-line principle as manual lock picking, but uses impact force to set multiple pins at once instead of picking them individually.

How to Use a Lock Pick Gun

1. Insert the pick gun's needle into the keyway, positioning it just below the bottom pin stack.

2. Insert a tension wrench at the bottom of the keyway and apply light, steady rotational pressure — the same amount used in manual lock picking.

3. Pull the trigger in short, consistent pulls rather than one hard squeeze, keeping tension steady throughout.

4. Adjust the needle depth slightly if pins aren't setting, since keyway depth varies by lock.

5. Continue pulling the trigger while maintaining tension until the plug rotates fully and the lock opens.

6. If the plug over-rotates or binds, use a plug spinner to reset it before trying again.

Consistent, light tension is the most important factor — too much pressure locks the pins in place before they can be struck properly, while too little prevents them from setting at all.

Main Characteristics of a Lock Pick Gun

• Manual or electric operation — manual pick guns use a spring-loaded trigger, while electric pick guns strike automatically at a set speed.

• Adjustable needle tension — many models allow the strike force to be adjusted for different pin sizes and lock brands.

• Interchangeable needle tips — some pick guns come with multiple needle profiles for different keyway shapes.

• Compact, ergonomic design — built for one-handed operation while the other hand manages the tension wrench.

• Best suited for standard pin tumbler locks — less effective on high-security, disc-detainer, or heavily spool-pinned cylinders.

Advantages of a Lock Pick Gun

• Speed — opens many standard pin tumbler locks faster than manual picking, especially useful on service calls.

• Lower skill barrier — easier to learn than fine manual picking, making it practical for locksmiths handling high call volumes.

• Non-destructive entry — opens the lock without damaging the cylinder, door, or frame.

• Reduced hand fatigue — the mechanical strike does the work of setting pins, unlike manual picks which require sustained precision.

• Versatile fieldwork tool — compact enough to carry alongside picks, tension wrenches, and plug spinners for a complete lockout kit.