Clamp angle adjusts in 10 degree increments. Hidden angle-adjusting teeth, totally new design! Strong investment-cast 316 stainless steel offers maximum corrosion resistance for long life. Adjusting teeth are hidden for a clean look. Strong four-screw mounting clamp resists slipping and fits tubes with outside diameters of 1-1/16", 1" or 7/8". Includes a white vinyl liner and integrally-cast gimbal pin.