The Simpson DIAST25 Setting Tool for 1/4 in. Rod DIA Drop-In Anchor by Simpson is engineered for the proper and consistent installation of Simpson Drop-In internally threaded anchors. The tool works by driving the expander plug toward the bottom of the anchor until the shoulder of the setting tool makes contact with the top of the anchor, delivering repeatable, reliable results every time. When paired with a fixed-depth drill bit, the tool helps prevent overdrilling - saving time on the job and prolonging bit life. Whether you are securing fasteners in concrete ceilings or other overhead surfaces, this carbon steel setting tool is purpose-built for the task.

Key Features

• Dedicated setting tool for DIA anchors - purpose-matched to Simpson Drop-In anchor models DIA25SS and DIA256SS, eliminating guesswork and reducing the risk of improper installation.
• Drives the expander plug to a consistent, controlled depth - the shoulder of the tool contacts the top of the anchor to signal full seating, so every anchor is set the same way every time.
• Designed for overhead applications - engineered to properly set drop-in anchors in ceiling and overhead orientations where reliable engagement is critical.
• Carbon steel construction - provides the durability needed to withstand repeated hammer blows during anchor installation on the job site.
• Compatible with a fixed-depth drill bit workflow - helps prevent overdrilling, which protects bit life and keeps the installation process efficient.
• Caution: oversized holes will make it difficult to set the anchor and will reduce the anchor's load capacity - using correctly sized holes is essential to achieving full holding strength.

Why This Product

• Consistent, properly set anchors every time - the shoulder-stop design takes the uncertainty out of drop-in anchor installation, ensuring the expander plug is driven to exactly the right depth on every use.
• Built specifically for overhead concrete fastening - unlike general-purpose tools, this setting tool is designed to handle the demands of overhead drop-in anchor applications where a secure, fully expanded anchor is non-negotiable.
• Helps protect hole integrity and anchor performance - by working alongside a fixed-depth drill bit, the tool supports a drilling and setting process that guards against overdrilling and the load capacity loss that comes with oversized holes.
• Durable carbon steel for long-term job site use - the carbon steel body holds up to repeated impact during setting, making it a dependable addition to any concrete anchoring toolkit.

Specifications

• MPN: DIAST25
• Brand: Simpson Strong-Tie
• Anchor Rod Size: 1/4 in.
• Compatible Models: DIA25SS, DIA256SS
• Material: Carbon Steel
• Packaging: Packs of 1 and Cartons of 40

Frequently Asked Questions

Which drop-in anchor models is the DIAST25 compatible with?

The DIAST25 setting tool is designed for use with Simpson Strong-Tie Drop-In models DIA25SS and DIA256SS. Drop-in anchors are sold separately.

How does the DIAST25 setting tool work?

The setting tool drives the expander plug toward the bottom of the anchor until the shoulder of the setting tool makes contact with the top of the anchor, ensuring the drop-in is properly and consistently installed.

Can this setting tool be used for overhead applications?

Yes, the DIAST25 is specifically designed to set drop-in anchors for overhead applications, providing reliable installation in those demanding orientations.

Why is hole size important when using the DIAST25?

Oversized holes will make it difficult to set the anchor and will reduce the anchor's load capacity. Using a fixed-depth drill bit is recommended to prevent overdrilling, which also saves time and prolongs bit life.

Note: Product dimensions may differ from picture.