Designed to fit most common anchor bolt dimensions at the middle and corners in the pad without needing to create a gap in the thickest Component of the pad. To put an get, you need to make an account or login towards your account to access the D.S. Brown on https://compositevibrationpads48024.xzblogs.com/79748419/indicators-on-compressor-vibration-pads-you-should-know