The blade releases via the slider on the rear shell of the handle. It is comfortably and easy to operate and as you mentioned only for accidental closing. The bestsellers in this series are the Picnicker, Rucksack and the Outrider. The model Workchamp XL is aimed at knife collectors.
At the moment we are developing an improving the spring for the locking blade and slider system. During testing of an material sample the stress strain curve is a graphical representation of the relationship between stress,derived from measuring the load applied on the sample and strain derived from measuring the deformation of the sample i.e. elongation, compression, or distortion. Steel generally exhibits a very linear stress-strain relationship up to a well defined yield point. The linear portion of the curve is in the elastic region and the slope is the modulus of elasticity or Young`s modulus. A torque in physics, also called moment, is a vector that measures the tendency of a force to rotate an object about some axis(center). The magnitude of a torque is defined as the product of a force and the length of the lever arm(radius) M=FxI. To stay in the elastic region a torque of maximum 10,8Nm should not be exceeded.
However we found them to be insufficiently robust and sturdy for the fire brigades, the rescue services the police and army forces. For this reason we developed a knife (0,83-0,84) of the same shape and size but much stronger, with thicker rivets and blades, Liner-lock for the blade and powerful screwdriver. In this range you will find the Victorinox lock blade for one hand opening (e.g. Rescuetool ).