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.