Angle Clamp, Miter Capacity 4 3/4 in, Jaw Width 4 1/2 in, Jaw Height 2 3/8 in, Throat Depth 9 1/2 in, Jaw Material Cast Iron, Spindle Material Copper, Clamping Capacity 9 1/2 in, Application Welding, Clamping Angle - Maximum 90 Degrees , Features Automatic Adjustment to Work Pieces of Different Thicknesses, Service Spindle Assembly (Item# 3100954), Self-Centering Yes