The Black and decker Slotted screwdriver handle fits the hand comfortably and allows 120 degrees turning action to reduce user strain. The durable bi-material handles resist commonly used household and garage chemicals. The ergonomically designed and bi-material handles give better torque. Warranty does not cover products that are improperly used, abused, altered, or repaired, nor does it cover consumable goods such as knife blades, screwdriver bits, etc.