A surgical instrument, comprising: a device comprising a functional end configured to be inserted into a body part; a main handle comprising a distal end coupled to a proximal end of the device; an actuation handle insert comprising a proximal end that is movably coupled to the main handle, the actuation handle insert comprising a number of first rolling components; an actuation tube coupled to a distal end of the actuation handle insert, wherein the functional end of the device at least partially extends outside of a distal end of the actuation tube when the device is in a deactivated state; a plurality of levers comprising proximal ends configured to be coupled to the main handle, wherein the plurality of levers comprise a corresponding number of second rolling components; and a plurality of rolling elements, wherein: each of the rolling elements is placed between one of the number of second rolling components and one of the number of first rolling components; and pressing one or more levers of the plurality of levers causes the rolling elements to roll down on at least one of the corresponding number of first rolling components or second rolling components and push the actuation handle insert forward relative to the device, causing the actuation tube to transition the device from the deactivated state to an activated state; each of the first rolling components comprises a ramp, on which one of the plurality of rolling elements is configured to roll; each of the second rolling components comprises a rolling element housing; and the rolling element housing comprises a groove, within which the one of the plurality of rolling elements is configure to roll wherein the ramp is arranged according to at least one of the following: (i) comprises side walls, which are configured to confine the one of the plurality of rolling elements, or (ii) comprises a protrusion at its bottom for limiting a movement of the one of the plurality of rolling elements. a device comprising a functional end configured to be inserted into a body part; a main handle comprising a distal end coupled to a proximal end of the device; an actuation handle insert comprising a proximal end that is movably coupled to the main handle, the actuation handle insert comprising a number of first rolling components; an actuation tube coupled to a distal end of the actuation handle insert, wherein the functional end of the device at least partially extends outside of a distal end of the actuation tube when the device is in a deactivated state; a plurality of levers comprising proximal ends configured to be coupled to the main handle, wherein the plurality of levers comprise a corresponding number of second rolling components; and a plurality of rolling elements, wherein: each of the rolling elements is placed between one of the number of second rolling components and one of the number of first rolling components; and pressing one or more levers of the plurality of levers causes the rolling elements to roll down on at least one of the corresponding number of first rolling components or second rolling components and push the actuation handle insert forward relative to the device, causing the actuation tube to transition the device from the deactivated state to an activated state; each of the first rolling components comprises a ramp, on which one of the plurality of rolling elements is configured to roll; each of the second rolling components comprises a rolling element housing; and the rolling element housing comprises a groove, within which the one of the plurality of rolling elements is configure to roll wherein the ramp is arranged according to at least one of the following: (i) comprises side walls, which are configured to confine the one of the plurality of rolling elements, or (ii) comprises a protrusion at its bottom for limiting a movement of the one of the plurality of rolling elements. each of the rolling elements is placed between one of the number of second rolling components and one of the number of first rolling components; and pressing one or more levers of the plurality of levers causes the rolling elements to roll down on at least one of the corresponding number of first rolling components or second rolling components and push the actuation handle insert forward relative to the device, causing the actuation tube to transition the device from the deactivated state to an activated state; each of the first rolling components comprises a ramp, on which one of the plurality of rolling elements is configured to roll; each of the second rolling components comprises a rolling element housing; and the rolling element housing comprises a groove, within which the one of the plurality of rolling elements is configure to roll wherein the ramp is arranged according to at least one of the following: (i) comprises side walls, which are configured to confine the one of the plurality of rolling elements, or (ii) comprises a protrusion at its bottom for limiting a movement of the one of the plurality of rolling elements. (i) comprises side walls, which are configured to confine the one of the plurality of rolling elements, or (ii) comprises a protrusion at its bottom for limiting a movement of the one of the plurality of rolling elements.