Crows Foot Wrench Set 8 Piece 3/8 Drive:

8pc 3/8-inch Drive Crowfoot Wrench Set
Sizes - 10. 11. 13. 14. 15. 17. 19. 22mm
U-notch cut grips fasteners on all of four sides
Speed up removal or installation of hard-to-reach fasteners, work where a conventional socket can't.