TEKTON WRN57190 Flex-Head Ratcheting Combination Wrench Set with Roll-up Storage Pouch, Metric, 8 mm - 19 mm, 12-Piece Box end head pivots 180 degrees to easily get around obstructions 6-point box end snugly fits hex-shaped fastener heads, gripping the flat sides, not corners, to prevent round-off 72-tooth ratchet gear needs only a 5-degree working swing arc Open end is angled 15 degrees so the wrench can be flipped over to engage fasteners twice as often in tight spaces Includes roll-up storage pouch with tailored cover that keeps wrenches in place so they can't slide out