An inductor for heating at least one substantially cylindrical component of a metal workpiece, the substantially cylindrical component attached on at least one side to an irregularly-shaped component, a fillet formed between the irregularly-shaped component and the substantially cylindrical component, the inductor formed from a first inductor segment and a second inductor segment, the first and second inductor segments having means for magnetically coupling to the second inductor segment an ac high frequency current supplied to the first inductor segment, a substantially closed opening formed partially in the first inductor segment and partially in the second inductor segment for placement of the substantially cylindrical component for heating by application of a magnetic field to the component, the magnetic field generated by the first and second inductor segments in response to excitation by the ac high frequency current, the first inductor segment formed from a solid electrically conductive material, the first inductor segment further comprising: a first facing surface; and a first through opening forming a first coil segment and a second coil segment disposed on opposing sides of the first through opening; the second inductor segment formed from a solid electrically conductive material, the second inductor segment further comprising: a second facing surface, the second facing surface disposed substantially adjacent to and electrically isolated from the first facing surface; and a second through opening forming a third coil segment and a fourth coil segment disposed on opposing sides of the second through opening; characterised by: at least one active cross sectional current restricting slit disposed in the first coil segment and the second coil segment to form at least two parallel coils in the first inductor segment, the at least one active cross sectional current restricting slit dividing each of the first and second coil segments (17a, 17b) into a first and second pair of coil sub-segments, a first partial opening in either of the first or second pair of coil sub-segments comprising the first or second coil segment (17a, 17b), the first partial opening having an arcuate coil surface divided by an orifice in at least one of the pair of coil sub-segments forming the first partial opening (21a, 22b), the orifice dividing the arcuate coil surface into a first pair of coil lips (23a, 23b), the first pair of coil lips forming an interface region with the adjoining first facing surface wherein the first pair of coil lips are profiled to selectively compensate for the irregular mass of the irregularly-shaped component, an opening on the surface of the substantially cylindrical component, or selective heating of the fillet; and a second partial opening in either the third or fourth coil segment (109a, 109b), the second partial opening (121a, 121b) having an arcuate coil surface divided by an orifice, the orifice dividing the arcuate coil surface into a second pair of coil lips, the second pair of coil lips forming an interface region with the adjoining second facing surface wherein the second pair of coil lips are profiled to selectively compensate for the irregular mass of the irregularly-shaped component, an opening on the surface of the substantially cylindrical component, or selective heating of the fillet, the first and second partial openings (21a, 122a) forming the substantially closed opening. a first facing surface; and a first through opening forming a first coil segment and a second coil segment disposed on opposing sides of the first through opening; a second facing surface, the second facing surface disposed substantially adjacent to and electrically isolated from the first facing surface; and a second through opening forming a third coil segment and a fourth coil segment disposed on opposing sides of the second through opening; at least one active cross sectional current restricting slit disposed in the first coil segment and the second coil segment to form at least two parallel coils in the first inductor segment, the at least one active cross sectional current restricting slit dividing each of the first and second coil segments (17a, 17b) into a first and second pair of coil sub-segments, a first partial opening in either of the first or second pair of coil sub-segments comprising the first or second coil segment (17a, 17b), the first partial opening having an arcuate coil surface divided by an orifice in at least one of the pair of coil sub-segments forming the first partial opening (21a, 22b), the orifice dividing the arcuate coil surface into a first pair of coil lips (23a, 23b), the first pair of coil lips forming an interface region with the adjoining first facing surface wherein the first pair of coil lips are profiled to selectively compensate for the irregular mass of the irregularly-shaped component, an opening on the surface of the substantially cylindrical component, or selective heating of the fillet; and a second partial opening in either the third or fourth coil segment (109a, 109b), the second partial opening (121a, 121b) having an arcuate coil surface divided by an orifice, the orifice dividing the arcuate coil surface into a second pair of coil lips, the second pair of coil lips forming an interface region with the adjoining second facing surface wherein the second pair of coil lips are profiled to selectively compensate for the irregular mass of the irregularly-shaped component, an opening on the surface of the substantially cylindrical component, or selective heating of the fillet, the first and second partial openings (21a, 122a) forming the substantially closed opening.