The T-handle driver is an excellent design that lets you apply more torque while maintaining more downforce than you could with a regular screwdriver. What truly sets it apart is the repositionable sliding spinner collar on the 13" shaft. Positioning the collar low on the shaft makes for a two-handed grip where the bottom hand controls the tip position as the upper applies force and torque. It is as excellent for installing hardware as it is for heavy driving.
For rapid fastener installation or removal, particularly with machine screws and bolts, the collar can be held while the handle is spun with a fingertip. The magnetic bit holder accepts any 1/4" hex-shank bits (not included).