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Simpson Drop-In Anchor (DIAB)Anchors

Simpson Drop-In Anchor (DIAB)

Simpson Strong-Tie now offers a redesigned Drop-In Anchor (DIAB) that provides easier installation into base materials. Improved geometry in the preassembled expansion plug allows the DIAB anchor to install with 40 percent fewer hammer strikes than previous versions.

These deformation-controlled expansion anchors are easily set by driving the plug toward the bottom of the anchor using Simpson Strong-Tie hand- or power-setting tools.

When preparing the anchor site, a Simpson Strong-Tie fixed-depth stop bit can be used to ensure drilling to the correct depth. The fluted design of the tip draws debris away from the hole during drilling, allowing for a cleaner installation.

Key features of DIAB anchors include:

  • Positive-set marking system to indicate when anchor is properly set
  • Lipped drop-in version that keeps top of anchor flush with concrete
  • UL and FM approvals

For more information about DIAB anchors, visit