Bondhus T-Handle Ball Driver SetThe slight downward angle of the handles are ergonomically superior to a straight T Handle Provides comfort and functionality Handle size matches blade torque to prevent over torqueing Bondhus T Handle enables a flywheel affect, allowing screws to be quickly spun in or out Bondhus T Handles do not have ball end tips on blades that are smaller than 5 32 inches or 4mm The T Handle could easily over torque and break these smaller size ball ends Bondhus T