Our mahogany ring clamp and newly developed bench "pin" allows the user to rotate rings and other items in virtually any direction for ease of work. Mahogany is the best wood available and this clamp features thick leather jaws for maximum grip, along with a strong metal axle for long life. The ridge near the end keeps the clamp secure in the strong metal yoke. The "pin" or yoke is made of 3/8" steel rod. When it is inserted into the bench it will not wobble, but turns "on-axis" for a solid feel and maximum control. With butcher block benches, simply drill a 3/8" hole 3-1/2" deep and insert the pin. You will get years of service from this fine set.