A tool for installation and removal of flexible couplings comprising: a first plate having a hinge member rigidly extending from the first plate and a shaft engaging feature defined in the first plate opposite the hinge member thereof; and a second plate having a hinge member rigidly extending from the second plate and a shaft engaging feature defined in the second plate opposite the hinge member thereof, wherein the hinge members of first and second plates are hinged together for rotation of the first and second plates about a hinge axis to actuate the shaft engaging features toward and away from one another; and characterised in that each shaft engaging feature includes a u-shaped cut out between two respective tines of the respective first or second plate, and wherein each u-shaped cut out defines a u-shaped edge of the plate that is itself contoured wrapping around the u-shaped edge, defining a contour that curves around the U-shaped edge, to provide an interface for a secure fit between the plates and a flexible driveshaft to reduce or eliminate damage to a flexible drive shaft interfacing with the shaft engaging features; wherein the contour on the first plate starts substantially perpendicular to a first surface of the first plate and curves convexly to be substantially tangent to a second surface of the first plate, wherein the contour on the second plate starts substantially perpendicular to a first surface of the second plate and curves convexly to be substantially tangent to a second surface of the second plate, wherein the second surface of the first plate and the second surface of the second plate face each other, wherein the first surface of the first plate is opposite the second surface of the first plate, and wherein the first surface of the second plate is opposite the second surface of the second plate. a first plate having a hinge member rigidly extending from the first plate and a shaft engaging feature defined in the first plate opposite the hinge member thereof; and a second plate having a hinge member rigidly extending from the second plate and a shaft engaging feature defined in the second plate opposite the hinge member thereof, wherein the hinge members of first and second plates are hinged together for rotation of the first and second plates about a hinge axis to actuate the shaft engaging features toward and away from one another; and characterised in that each shaft engaging feature includes a u-shaped cut out between two respective tines of the respective first or second plate, and wherein each u-shaped cut out defines a u-shaped edge of the plate that is itself contoured wrapping around the u-shaped edge, defining a contour that curves around the U-shaped edge, to provide an interface for a secure fit between the plates and a flexible driveshaft to reduce or eliminate damage to a flexible drive shaft interfacing with the shaft engaging features; wherein the contour on the first plate starts substantially perpendicular to a first surface of the first plate and curves convexly to be substantially tangent to a second surface of the first plate, wherein the contour on the second plate starts substantially perpendicular to a first surface of the second plate and curves convexly to be substantially tangent to a second surface of the second plate, wherein the second surface of the first plate and the second surface of the second plate face each other, wherein the first surface of the first plate is opposite the second surface of the first plate, and wherein the first surface of the second plate is opposite the second surface of the second plate. <EOS>