The tools for carpet weaving are simple and few. There’s the loom, in a horizontal position. The weaver squats on the finished carpet as she weaves. She ties new knots of dyed yarn along the edge. She trims the tied knot with the curved knife. Then she tightens the finished row of knots with the long-handled comb. Then, she further trims the area she just finished with the scissors, maintaining an even pile on the whole carpet.