Steel centers provide long-lasting marking properties,chrome plated surface, durable and long time use. Purpose:Two connecting plates are used to locate the drilling center of the plate, which is used as a bracket for painting. Package Including: 2 x 1/4"(6mm) Dowel Center 2 x 5/16"(8mm) Dowel Center 2 x 3/8"(10mm) Dowel Center 2 x 1/2"(12mm) Dowel Center Note: 1.Please allow 2-3mm errors due to manual measurement. 2.Item color displayed in photos may be showed slightly differences on your computer monitor since monitors are not calibrated same.