Lastly, Oak is a strong, sturdy, and versatile wood for carving with a defined grain. It was made of sturdy but very stiff brown colored cowhide leather. Molas are very sturdy and well sewn. The hindlegs should be heavy, muscular and sturdy. The knives from Eickhorn are extremely sturdy and for professional use. Wrought iron is another choice that is traditional and sturdy. Large stick nests in sturdy trees are generally used. Pendulum clocks should be attached firmly to a sturdy wall. She was designed for polar conditions with a very sturdy construction. This was because they were simple, relatively sturdy, and reliable. It was considered to be sturdy and very manoeuvrable for a glider. The system was heavily built, in terms of sturdy tracks and strong bridges. Extensive use of prestressed concrete resulted in a simple and sturdy structure. The "Berkasovo" type was a more sturdy and protective ridge helmet. They travelled from pub to pub clad in sturdy leather britches.