Facom 440 combination wrenches are designed to combine compactness with strength they ensure maximum user safety and when a critical tightening torque is reached the wrench is distorted gradually meaning no breaking is likely to injure the user dimensions meet the requirements of tooling standards nf iso 1711 1 and aerospace standard sae as 954gtightening is guaranteed significantly above specifications of high strength tooling and bolting standards iso 898 1