The 440 combination wrench was designed to combine compactness with strength Dimensions meet the requirements of tooling standards NF ISO 1711-1 and aerospace standard SAE AS 954G Tightening torques guaranteed significantly above specifications of high strength tooling and bolting standards ISO 898-1 (quality class 12.9) The 440 combination wrench was also designed to ensure maximum user safety. When critical tightening torques are reached the wrench is distorted gradually No brutal breaking likely to injure the user