A medical device control handle has a first actuation member for actuating at least one puller wire in one manipulation of a medical device, including uni-directional deflection, if not a pair of puller wires for bi-directional deflection of a catheter, and a second actuation member for actuating an additional puller wire in another manipulation of the medical device, wherein the first and second actuation members have a common rotational axis without being rotationally coupled. In one embodiment, a first actuation assembly has a first actuator, an arm rotatable about an axis, and a first shaft. The first deflection actuator and the arm are rotationally coupled by the rotation shaft, and the arm has at least one pulley that is engaged with a puller wire. The second wire actuation assembly has a second actuator and a second shaft having a spool portion. Each actuation assembly has a friction-inducing element that provides friction torque between components of each assembly such that the actuators are self-holding.