The Wera 454/10 HF 10 Piece T-Handle Imperial Screwdriver Set includes a range of Ergonomic High Torque T-shape handled HF Keys for the most common imperial sizes you might come across, featuring an Anti-corrosion coating, quick select colour coding and a handy storage rack system.T-handle screwdriver for High-torque tightening and loosening momentsErgonomic 2-component handle for fatigue-free working comfort and grip.Take it easy tool finder: colour coding according to profile and sizeHolding function (HF) on the long arm to securely hold the screw on the toolThe T-handle design is the optimal shape to fully fit the palm and fingers of the hand with softly rounded finger recesses that ensure maximum comfort and energy transfer into the tool as it becomes an extension of your arm, which in turn gives greater leverage and reduces fatigue in cases of prolonged use.The HF (Holding Function) profile is Wera's improvement of the original specification which introduces a tighter fitting prof