GN 910.2 heavy duty knee lever modules have the same properties and attributes as the "longlife" GN 910 and GN 910.1 heavy duty vertical acting toggle clamps. The clamping arms are die-forged, the remaining steel sheet parts have been reinforced, and bearing pnis and rivets are hardened and ground. These vertical clamps are therefore suitable for applications in which substantial forces occur and in which a long service life is required. During extensive testing, with trouble free function and under load, the clamp has withstood over one million opening and closing cycles. These heavy duty knee lever modules permit the size and position of the lever and clamping arms to be adjusted to match the specific application.