Item #: 08021511Brand: Suburban ToolModel #: AP444S1 Features and Benefits Steel is a sting and durable material used for general purpose applications. Precision ground plates are used for close tolerance layout and inspection set-up. Slotted angle plates are designed with clamping slots for mounting, layout and inspection operations. They can be used as backing plates and constructed with varying spacing between slots and holes. Product Specifications Width (Inch) 4 Depth (Inch) 4 Height (Inch) 4 Material Steel Finish Type Precision-Ground Plate Surface Machined Holes Plate Style Standard Plate Design Open End Plate Thickness (Inch) 1-1/4 Number of Holes 17 Parallelism (Decimal Inch) 0.0002 Squareness (Decimal Inch) 0.0002 Hole Size (13) 1/4-20; (4) 5/16" x 7/16" Counterbored Sine Plate Compatibility S1 Single or Pair Single