The Master Lock No. 4400D Bluetooth padlock features a 1-29/32 in (47 mm) wide metal body for durability. The 9/32 in (7 mm) diameter shackle offers 7/8 in (22 mm) vertical clearance and is made of boron alloy, offering maximum resistance to cutting and sawing. The smartphone/app interface offers sp..
The Master Lock No. 4401DLH Bluetooth padlock features a 2-7/32 in (56 mm) wide metal body for durability. The 11/32 in (9 mm) diameter shackle offers 2 in (51 mm) vertical clearance and is made of boron alloy, offering maximum resistance to cutting and sawing. The smartphone/app interface offers sp..