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A cutter apparatus includes a housing with a blade carrier configured for holding a blade, and a handle coupled to the housing via an engagement interface configured to allow a user of the cutter apparatus to selectively interfit together the housing and the handle in multiple different cutter appar

A cutter apparatus includes a housing with a blade carrier configured for holding a blade, and a handle coupled to the housing via an engagement interface configured to allow a user of the cutter apparatus to selectively interfit together the housing and the handle in multiple different cutter apparatus configurations, wherein the engagement interface includes a coupler configured to permit the housing and the handle to be repositioned further apart in a housing/handle reconfiguring mode in which the coupler permits the handle to be rotatably repositioned in relation to the housing or vice versa while substantially limiting longitudinal movement of the housing relative to the handle.

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1. A cutter apparatus comprising: a housing with a blade carrier configured for holding a blade; anda handle coupled to the housing via an engagement interface configured to allow a user of the cutter apparatus to selectively interfit together the housing and the handle in multiple different cutter

1. A cutter apparatus comprising: a housing with a blade carrier configured for holding a blade; anda handle coupled to the housing via an engagement interface configured to allow a user of the cutter apparatus to selectively interfit together the housing and the handle in multiple different cutter apparatus configurations;wherein the engagement interface includes a channel and a bearing configured to permit the housing and the handle to be repositioned further apart in a housing/handle reconfiguring mode in which the handle is rotatably repositionable in relation to the housing about a rotational axis or vice, wherein the rotational axis extends longitudinally in a length direction of the cutter apparatus, the bearing including a recess that engages a portion of the channel when the housing and the handle are in the housing/handle reconfiguring mode. 2. The cutter apparatus of claim 1, wherein the engagement interface is configured to allow the housing and the handle to interfit in multiple different predetermined configurations. 3. The cutter apparatus of claim 1, wherein the engagement interface includes an interior interface configured to couple the housing and the handle together. 4. The cutter apparatus of claim 3, wherein the interior interface is configured to couple the housing and the handle such that the handle is slidably and rotatably repositionable in relation to the housing or vice versa. 5. The cutter apparatus of claim 1, wherein the engagement interface includes an exterior interface configured to automatically lock the housing and the handle together when the housing and the handle are repositioned to interfit together in one of the cutter apparatus configurations. 6. The cutter apparatus of claim 5, wherein the exterior interface is configured to allow a user of the cutter apparatus to unlock the housing and the handle by actuating multiple release devices provided on one or more of the housing and the handle. 7. The cutter apparatus of claim 1, wherein the bearing is secured within and repositionable in relation to the channel. 8. The cutter apparatus of claim 1, wherein the blade carrier is configured for holding the blade in multiple different cutting edge orientations in relation to the housing, the cutting edge orientations including a pair of cutting edge orientations that are mirror images of each other. 9. The cutter apparatus of claim 8, wherein the multiple different cutter apparatus configurations include a pair of configurations which, in conjunction with cutting edge orientations respectively selected from the pair of mirror image cutting edge orientations, accommodate ambidextrous operation of the cutter apparatus. 10. The cutter apparatus of claim 1, wherein the housing includes multiple guards. 11. The cutter apparatus of claim 10, wherein the handle is coupled to and repositionable in relation to the housing to multiple different engagement positions at which the housing and the handle are secured together and a different guard is positioned for contact with a workpiece for each of the engagement positions. 12. A cutter apparatus, comprising: a housing with a blade carrier configured for holding a blade; anda handle coupled to the housing via an engagement interface configured to allow a user of the cutter apparatus to selectively interfit together the housing and the handle in multiple different cutter apparatus configurations;wherein the engagement interface includes a coupler configured to permit the housing and the handle to be repositioned further apart in a housing/handle reconfiguring mode in which the coupler permits the handle to be rotatably repositioned in relation to the housing or vice versa while substantially limiting longitudinal movement of the housing relative to the handle;wherein the engagement interface includes a channel and a bearing secured within and repositionable in relation to the channel;wherein the channel includes or is provided with an inwardly extending annular ridge and the bearing includes or is provided with one or more engagement surfaces configured to be repositionable in relation to the channel, the ridge and the bearing being configured such that the ridge prevents the bearing from exiting the channel. 13. The cutter apparatus of claim 12, wherein the bearing includes a recess that is configured to engage opposite sides of the ridge facilitating rotational mobility of the handle in relation to the housing, or vice versa. 14. The cutter apparatus of claim 12, wherein the bearing including a recess that engages a portion of the handle when the handle and the housing are in the housing/handle reconfiguring mode. 15. The cutter apparatus of claim 14, wherein the recess is circumferential. 16. A cutter apparatus, comprising: a housing with a blade carrier configured for holding a blade; anda handle coupled to the housing via an engagement interface configured to allow a user of the cutter apparatus to selectively interfit together the housing and the handle in multiple different cutter apparatus configurations;wherein the engagement interface includes a coupler configured to permit the housing and the handle to be repositioned further apart in a housing/handle reconfiguring mode in which the coupler permits the handle to be rotatably repositioned in relation to the housing about a rotational axis or vice versa, wherein the rotational axis extends longitudinally in a length direction of the cutter apparatus while substantially limiting longitudinal movement of the housing relative to the handle;wherein the engagement interface includes a channel and a spring-biased circumferential detent configured to receive a complementary ridge structure of the channel therein providing a circumferential engagement of the housing and the handle. 17. A cutter apparatus comprising: a housing with a blade carrier configured for holding a blade; anda handle coupled to the housing via an engagement interface configured to allow a user of the cutter apparatus to selectively interfit together the housing and the handle in multiple different cutter apparatus configurations;wherein the engagement interface includes a coupler configured to permit the housing and the handle to be repositioned further apart in a housing/handle reconfiguring mode in which the handle is rotatably repositionable in relation to the housing about a rotational axis or vice versa, wherein the rotational axis extends longitudinally in a length direction of the cutter apparatus and to engage a portion of the handle when the handle and the housing are interfitted together in a locked configuration;wherein the engagement interface includes a channel and a bearing secured within and repositionable in relation to the channel, the bearing including a recess that engages a portion of the handle when the handle and the housing are in the housing/handle reconfiguring mode. 18. The cutter apparatus of claim 17, wherein the bearing includes a ridge that engages the handle when the handle and the housing are interfitted together in the locked configuration. 19. The cutter apparatus of claim 18, wherein the engagement interface is configured such that the ridge engages an inner portion or surface of the handle when the handle and the housing are interfitted together in the locked configuration. 20. The cutter apparatus of claim 17, wherein the housing includes multiple guards. 21. The cutter apparatus of claim 20, wherein the handle is coupled to and repositionable in relation to the housing to multiple different engagement positions at which the housing and the handle are secured together and a different guard is positioned for contact with a workpiece for each of the engagement positions.