Steering tool

A steering tool comprising:

• an internal tube disposed inside an external tube, said internal and external tubes being arranged for longitudinal axial movement relative to one another, wherein a distal end of said internal tube is fixedly joined to a distal end of said external tube, and at least one of said internal and external tubes is formed with transverse slots near the distal end thereof, and wherein the longitudinal axial movement causes bending of the distal ends of said internal and external tubes;
• and wherein shapes of said transverse slots change as a parameter of distance from the distal ends of said internal and external tubes;
• and
• wherein said internal tube is coupled to an internal tube holder that comprises a septum that seals passage of said internal tube therethrough, said septum comprises a radially outward portion secured to an inner surface of said internal tube holder and an inner aperture through which said internal tube passes therethrough;
• and
• wherein a proximal end of said external tube is affixed or locked in an external tube holder at a distal end of a handle and said internal tube extends through said handle, a proximal portion of said internal tube being held by a proximal internal tube holder, and wherein said handle comprises a tube manipulator operative to cause relative axial movement of said internal and external tubes, and
• wherein said tube manipulator is arranged to abut against or be connected to a movable portion of said handle, said movable portion being connected to or abutting against said external tube holder, and wherein distal movement of said tube manipulator causes said movable portion to move distally and cause said internal tube to move distally to cause bending of distal tips of said internal and said external tubes, and wherein said tube manipulator is arranged to click into a groove formed in said handle to lock said tube manipulator in place.