Gearwrench 7 piece flex ratcheting box end and open end combination wrench set. Patented surface drive reduces fastener rounding. Flex head tilts up to 180° at any interval. Set screw allows you to set head tension. Ratcheting box-end needs as little as 5 degree turn to move fastener. Designed for tight spaces. Sleek head design enables access to tight spots where a ratchet will not fit. Surface drive nearly eliminates fastener rounding. Wrench beam is slightly serrated on one side. Includes: 10 mm, 12 mm, 13 mm, 14 mm, 15 mm, 17 mm, and 19 mm.