An apparatus for controlling a cylindrical medical device, comprising: a bottom component (101, 201, 301, 501, 802) having a working channel (104, 204, 304, 504, 704, 904, 1404, 1604, 1704, 1804, 1904) and one or more fingers (108, 208, 308, 808, 1008, 1108) comprising a sliding track (305, 505), each of the one or more fingers (108, 208, 308, 808, 1008, 1108) having a top surface, a side surface, and a bottom surface; and a top component (102, 202, 402, 502, 801) having one or more slots (109, 209, 409, 809) corresponding to the one or more fingers (108, 208, 308, 808, 1008, 1108) comprising the sliding track (305, 505), the top component (102, 202, 402, 502, 801) being slidable along the sliding track (305, 505), wherein the top component (102, 202, 402, 502, 801), upon being slid along the sliding track (305, 505) from a rearward end of the apparatus to a forward end of the apparatus, is frictionally engaged with the cylindrical medical device, said cylindrical medical device being secured therein, characterized in the sliding track (305, 505) comprising gradations along the top surface of each of the one or more fingers (108, 208, 308, 808, 1008, 1108), said gradations allowing the top component (102, 202, 402, 502, 801) to reversibly slide in a step-wise manner from the rearward end of the apparatus to the forward end of the apparatus, the sliding track (305, 505) is declined from the rearward end of the bottom component (101, 201, 301, 501, 802) to the forward end of the bottom component (101, 201, 301, 501, 802), a distance from a bottom surface of each of the one or more fingers (108, 208, 308, 808, 1008, 1108) to a surface of the working channel decreasing, accordingly, along a working axis of the bottom component. a bottom component (101, 201, 301, 501, 802) having a working channel (104, 204, 304, 504, 704, 904, 1404, 1604, 1704, 1804, 1904) and one or more fingers (108, 208, 308, 808, 1008, 1108) comprising a sliding track (305, 505), each of the one or more fingers (108, 208, 308, 808, 1008, 1108) having a top surface, a side surface, and a bottom surface; and a top component (102, 202, 402, 502, 801) having one or more slots (109, 209, 409, 809) corresponding to the one or more fingers (108, 208, 308, 808, 1008, 1108) comprising the sliding track (305, 505), the top component (102, 202, 402, 502, 801) being slidable along the sliding track (305, 505), wherein the top component (102, 202, 402, 502, 801), upon being slid along the sliding track (305, 505) from a rearward end of the apparatus to a forward end of the apparatus, is frictionally engaged with the cylindrical medical device, said cylindrical medical device being secured therein, characterized in the sliding track (305, 505) comprising gradations along the top surface of each of the one or more fingers (108, 208, 308, 808, 1008, 1108), said gradations allowing the top component (102, 202, 402, 502, 801) to reversibly slide in a step-wise manner from the rearward end of the apparatus to the forward end of the apparatus, the sliding track (305, 505) is declined from the rearward end of the bottom component (101, 201, 301, 501, 802) to the forward end of the bottom component (101, 201, 301, 501, 802), a distance from a bottom surface of each of the one or more fingers (108, 208, 308, 808, 1008, 1108) to a surface of the working channel decreasing, accordingly, along a working axis of the bottom component.