A latch system comprising: a first latch component comprising a first magnet; and a second latch component comprising: a first component comprising a first magnetically permeable component; and a second component disposed apart from and rotatably mounted with respect to the first component and comprising at least one second magnet disposed on a second magnetically permeable component, wherein, when the first latch component is disposed proximal to the second latch component, the first magnet attracts the at least one second magnet to rotate the second component from a first position with respect to the first latch component to a second position with respect to the first latch component to engage the first latch component and the second latch component by magnetic attraction between the first magnet and the at least one second magnet wherein a strength of the at least one second magnet is below an upper threshold to prevent movement of the magnet from the first position to the second position when a passive magnetic material is introduced at the external surface; and wherein the strength of the at least one second magnet is above a lower threshold to cause movement of the magnet from the first position to the second position when the first latch component is introduced at the external surface. a first latch component comprising a first magnet; and a second latch component comprising: a first component comprising a first magnetically permeable component; and a second component disposed apart from and rotatably mounted with respect to the first component and comprising at least one second magnet disposed on a second magnetically permeable component, wherein, when the first latch component is disposed proximal to the second latch component, the first magnet attracts the at least one second magnet to rotate the second component from a first position with respect to the first latch component to a second position with respect to the first latch component to engage the first latch component and the second latch component by magnetic attraction between the first magnet and the at least one second magnet wherein a strength of the at least one second magnet is below an upper threshold to prevent movement of the magnet from the first position to the second position when a passive magnetic material is introduced at the external surface; and wherein the strength of the at least one second magnet is above a lower threshold to cause movement of the magnet from the first position to the second position when the first latch component is introduced at the external surface. a first component comprising a first magnetically permeable component; and a second component disposed apart from and rotatably mounted with respect to the first component and comprising at least one second magnet disposed on a second magnetically permeable component, wherein, when the first latch component is disposed proximal to the second latch component, the first magnet attracts the at least one second magnet to rotate the second component from a first position with respect to the first latch component to a second position with respect to the first latch component to engage the first latch component and the second latch component by magnetic attraction between the first magnet and the at least one second magnet wherein a strength of the at least one second magnet is below an upper threshold to prevent movement of the magnet from the first position to the second position when a passive magnetic material is introduced at the external surface; and wherein the strength of the at least one second magnet is above a lower threshold to cause movement of the magnet from the first position to the second position when the first latch component is introduced at the external surface.