The Teng Tools TM708 series is a double ended mini screwdriver set. It includes fully interchangeable double ended blades including flat (slotted), PH, PZ and TX blades. It has rotating end piece for easier use when "transporting" the fastening. Sizes clearly marked on the shaft
Hexagon shaft
Twist grip tightening function allows the blade to be set at different lengths, ideal for where access is restricted