Williams WS-1172RSC 14-Piece Red Super Combo Combination Wrench Set

SUPERTORQUE box opening design allows application of higher torque without rounding or deforming hex fastener points. No contact is made at the corners. Instead, wrenching forces are placed on the flat surfaces behind the points. Meets or exceeds aerospace specification AS 954 for 12 point fasteners (as defined by AS 870) to provide accurate torque/tension relationship for precision application. Box and open end openings are identical.