A hinge adapted to interconnect first and second objects (11, 12) including: a leaf unit including first and second leaves (21, 22) that are rotatable relative to each other, said first leaf having at least two first barrels, said second leaf having at least one second barrel that is spaced apart from said first barrels along an axis; two force-providing units being inserted into said first barrels and said second barrel respectively in two opposite directions along the axis, and being co-rotatable with said first leaf; and an axle unit including a fixing member that is removably mounted in said second barrel of said second leaf and that is co-rotatable with said second leaf, and two axles that are respectively associated with said force-providing units and that are co-rotatably mounted to said fixing member, said fixing member and said axles being configured as independent components, each of said axles and said corresponding force-providing unit being rotated relative to each other upon relative rotation between said first and second leaves (21, 22) so that said corresponding force-providing unit generates an actuating force that acts between said first and second leaves (21, 22); said hinge being characterized in that each of said force-providing units includes a tubular member that is inserted into said first and second barrels (211, 221) and that is co-rotatable with said first leaf, a torsion spring that is disposed in said tubular member and that surrounds said corresponding axle, and an adjusting member that is rotatably disposed in said tubular member and that is able to be positioned relative to said tubular member, said torsion spring of each of said force-providing units having two end portions (321, 322) that are respectively connected to said adjusting member of said force-providing unit and said corresponding axle; and at least one of said force-providing unit further includes an auxiliary spring and a slide block, said axle that corresponds to the one of said force-providing unit having a rectangular auxiliary axle portion, said adjusting member of the one of said force-providing unit further having an inclined surface, said auxiliary spring being sleeved on said corresponding axle and surrounded by said torsion spring of the one of said force-providing unit, said slide block abutting against an end of said auxiliary spring, and having a rectangular hole that is engaged with said auxiliary axle portion of said corresponding axle, and an inclined surface that faces said inclined surface of said adjusting member, said slide block being co-rotatable with said corresponding axle, and being movable along said auxiliary axle portion of said corresponding axle along the axis. a leaf unit including first and second leaves (21, 22) that are rotatable relative to each other, said first leaf having at least two first barrels, said second leaf having at least one second barrel that is spaced apart from said first barrels along an axis; two force-providing units being inserted into said first barrels and said second barrel respectively in two opposite directions along the axis, and being co-rotatable with said first leaf; and an axle unit including a fixing member that is removably mounted in said second barrel of said second leaf and that is co-rotatable with said second leaf, and two axles that are respectively associated with said force-providing units and that are co-rotatably mounted to said fixing member, said fixing member and said axles being configured as independent components, each of said axles and said corresponding force-providing unit being rotated relative to each other upon relative rotation between said first and second leaves (21, 22) so that said corresponding force-providing unit generates an actuating force that acts between said first and second leaves (21, 22); each of said force-providing units includes a tubular member that is inserted into said first and second barrels (211, 221) and that is co-rotatable with said first leaf, a torsion spring that is disposed in said tubular member and that surrounds said corresponding axle, and an adjusting member that is rotatably disposed in said tubular member and that is able to be positioned relative to said tubular member, said torsion spring of each of said force-providing units having two end portions (321, 322) that are respectively connected to said adjusting member of said force-providing unit and said corresponding axle; and at least one of said force-providing unit further includes an auxiliary spring and a slide block, said axle that corresponds to the one of said force-providing unit having a rectangular auxiliary axle portion, said adjusting member of the one of said force-providing unit further having an inclined surface, said auxiliary spring being sleeved on said corresponding axle and surrounded by said torsion spring of the one of said force-providing unit, said slide block abutting against an end of said auxiliary spring, and having a rectangular hole that is engaged with said auxiliary axle portion of said corresponding axle, and an inclined surface that faces said inclined surface of said adjusting member, said slide block being co-rotatable with said corresponding axle, and being movable along said auxiliary axle portion of said corresponding axle along the axis.