Khao thon [kʰàw tʰoːn] (Straight knee strike) – the boxer simply thrusts it forward but not upwards, unless he is holding an opponents head down in a clinch and intend to knee upwards into the face. According to one written source, this technique is somewhat more recent than khao dot or khao loi Supposedly, when the Thai boxers fought with rope-bound hands rather than the modern boxing gloves, this particular technique was subject to potentially vicious cutting, slicing and sawing by an alert opponent who would block it or deflect it with the sharp "rope-glove" edges which are sometimes dipped in water to make the rope much stronger. This explanation also holds true for some of the following knee strikes below as well.