The Telamiina 65 77 (Track mine model 66, with detonator model 77) is a Finnish Army standard issue anti-tank mine. The mine is made of 9.5 kg (~21 lbs) of cast TNT. The mine is armed with a detonator that is set to explode when at least 100 kg (~220 lbs) of pressure is applied to it. The blast effect of the mine blows the track off of tanks and damages their driving wheel.