391/3 Hose clamp screwdriver set, 3 pieces 3x 391 Hose clamp screwdriver: 6x167 mm, 7x167 mm, 8x167 mmHigh quality hose clamp screwdriver by Wera. Multi-component Kraftform handle for high working speeds and particularly ergonomic screwdriving. Kraftform Plus: hard gripping zones for high working speeds whereas soft zones ensure high torque transfer. Flexible blade for reaching difficult-to-access places. Hexagonal anti-roll feature prevents any rolling away and handle markings make for simplified finding and sorting of the tool.