Kraftform Big Pack 300Product Description: Wera Big Pack 300 Kraftform Plus Lasertip Screwdriver Set. Weras Kraftform Plus handle has been designed to fit perfectly into the hand to allow for a fast, comfortable and ergonomic screwdriving experience. The handles hard zones glide like wheels across the hand for high working speeds, while soft zones provide grip to ensure high torque transfer and comfort during intensive use. A hexagonal anti roll feature prevents any