While most locks use physical keys to open them, some are now able to unlock with just a touch of the finger. These devices, made for bikes, lockers and more, make use of a technology called biometrics, which taps into the unique identifier each person has from the scan of their iris to their fingerprint.

There are seven on our list — two we've tested ourselves — that can work to secure a gate, a bike, a scooter and your locker at school or the gym. All but one is under $100, and some are from names with a rich history in keeping what you value secure.

Benjilock Fingerprint Sport PadlockGearBrain

Benjilock Fingerprint Sport Padlock

Benjilock is a company known for its biometrics, and its backed by Hampton known for its locks — so the marriage is a good one. The Benjilock Fingerprint Sport Padlock looks like another gym lock, but at the bottom is a USB port for charging the device and the front has a sensor where you place your finger to open it.

You can store up to 10 fingerprints here, and the battery, on a single charge, should last for up to six months. We reviewed the lock in white, but the web site currently has the lock available for $29.99 and just in red and black.

Buy on Amazon

Benjilock Fingerprint Bike LockGearBrain

Benjilock Fingerprint Bike Lock

The Benjilock Fingerprint Bike Lock has a steel shackle, that's got the heft behind it. The lock works with a single touch fingerprint — and you can store up to 10 — and the battery, once charged, works for up to six months.

Just in case you like having a backup, you get one here in the form of keys which means if there's an issue you can just unlock the U-shaped lock quickly. This lock retails for $79.99 and comes in black. You can read more about the review on GearBrain's web site.

Tapplock liteTapplock

Tapplock lite

Tapplock lite likes to talk on about the weight of its lock and how fast it works, unlocking in just .8 seconds. We're a bit more interested in the fact the company claims it can store 100 different fingerprints inside. Everything is controlled via the Tapplock app (iOS and Android), which links up to the lock itself over Bluetooth, a second way actually to unlock the device. And you can actually use a third method to unlock the lock — Morse Code.

The battery inside works for eight months, and you can pick one of these up on the web site for $49 in red, black or yellow — or a double pack in lack for $91.

Buy on Amazon - $49

Masterlock Biometric PadlockMasterlock

Masterlock Biometric Padlock

This biometric padlock comes courtesy of a brand almost synonymous with locks — Masterlock. The Biometric Padlock works with up to fingerprints but you can also open it with a directional code on the keypad. There's a cover for protecting the sensor when used outside and it uses a CR2 battery, which can be replaced.

This is a pretty small padlock with a two-inch shackle which retails for about $164 in just black.

Buy on Amazon - $209.99

Sharper Image Fingerprint LockSharper Image

Sharper Image Fingerprint Lock

From Sharper Image comes a very affordable biometric lock, which retails for $39.99. The Sharper Image Fingerprint Lock comes in black, and can store up to 10 fingerprints inside. The battery is rechargeable but can lasts up to about 2,000 unlocks at a time.

Do know that at $39.99 you're getting a lock made of plastic, unlike some of the steel locks we mentioned above. But this has a one-year warranty should anything go wrong.

Buy on Amazon - $39.99

Ulac Tron XDUlac

Ulac lock

This lock features an unusual design, and even nabbed a coupe of awards in 2019 for its look The Ulac Tron XD is a U-shaped shackle lock which look a bit like a bike lock meets a padlock.

You can open this with a key if needed, and also attach a USB charger for a quick battery boost to unlock should the lock be low on power. But the company says it can get 2200 unlocks in on one full charge. The lock retails for $89.99 and comes in black.

Buy on Amazon - $29.95

SL Elite Cable LockSL Elite

SL Elite Cable Lock

This is a cable lock with an end, or lock, that opens with a fingerprint. This device can hold up to 20 fingerprints and a full charge can unlock the lock 3,000 times. The 39.4-inch steel cable is flexible which works on really anything from a gate to a bike.

You can use the SL EliteFingerprint Bike Lock outside, it has an IP66 rating, which means the lock is waterproof.

Looking for more biometric locks? Here are five biometric locks that debuted at CES 2021, including some for your door and a small safe for your valuables, all that use biometric sensors to keep them secure.

SL Elite Fingerprint Bike Lock, Anti-Theft Keyless Bicycle Lock with USB Charge IP66 Waterproof 39.4 inch Bicycle Cable Locks for Bike, Motorcycle, Door, Fence

List Price: $45.77

New From: $44.99in Stock