Roll pins are made of 65Mn steel material, the hardness of 65Mn spring steel is higher than other steels. Its hardness is mainly due to the addition of manganese, which enhances the material’s wear resistance and load-bearing strength.
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Video Smart Lock with Camera: 6-in-1 2K Camera Fingerprint Keyless Entry
Brand New In The Box Never Used . Awesome lock I purchased 2 of them but decided only needed the 1 unit. The Video Smart Lock with Camera is a versatile and secure option for keyless entry, featuring a 2K camera for clear video capture and a fingerprint sensor for added security. This model is compatible with smartphones, Alexa, and Google Assistant, allowing for convenient control through the application. With a sleek design and motion-only alert type, this lock provides peace of mind and flexibility for your home or business. The package includes everything needed for installation, making it a convenient and efficient choice for modern security needs.