OTTER MESSEROTTER MESSER Is a small German factory that produces knives since 1840. THE WEAVER'S KNIFE. The small weaver’s knife was originally used in the former weaving mills and the textile industry in the Bergisches Land region of North Rhine-Westphalia. Blade: Carbon steel C75 / Handle material: Sapele or synthetic shell (black), iron bolster / Blade length: 7.5 cm / Hand- le length: 9cm