Bottom Line Master Lock's 4400D Indoor Bluetooth Padlock lets you pop it open with the touch of a button and provide guest access to anyone you want.

Master Lock's new padlock unlocks using your fingerprint, so you'll never lose those fiddly keys again. It can even be "jump-started" if the battery fails.

Master Lock has also devised a groove system on the bottom of the padlock that acts as a key guide, aiding users with sight challenges to easily insert the key. Master Lock’s innovative portable lock ...

The all-weather Master Lock 4401DLH padlock can be controlled by your smartphone, and lets you grant guest access, but it'll cost you a pretty penny.

The Master Lock 4401DLH Outdoor Bluetooth Padlock is a heavier, more rugged version of the excellent, indoor-focused 4400D.

Click to viewNext time you forget the combination to your Master padlock (you know, the one you bought because it's bulletproof), follow DIY web site wikiHow's step-by-step instructions for ...

Or want some incentive to not use a Master padlock? There’s a website for that. The video above from Samy Kamar shows how you can crack any Master combination lock within eight tries.

Master Lock 4400D Indoor Bluetooth Padlock Master Lock's 4400D Indoor Bluetooth Padlock lets you pop it open with the touch of a button and provide guest access to anyone you want.

Bottom Line Master Lock's 4400D Indoor Bluetooth Padlock lets you pop it open with the touch of a button and provide guest access to anyone you want.