Product Description
OZ-Post® I25-850 Ornamental Post Anchor — Fits 2-1/2″ × 2-1/2″ Square Posts — 34″ Length
- No-Dig Anchor for 2-1/2″ Posts — Drives into the ground to set square steel or aluminum ornamental posts without concrete
- Deeper Embedment — 34″ overall length provides added depth for taller panels and wind-exposed sites
- Durable Construction — Heavy hot-dip galvanized steel body with a black powder-coated sleeve for a clean finished look
- Consistent, Clean Installs — Leave ≈ 3/4″ of sleeve above grade for easy fastening and a neat transition to the fence line
- Driver-Kit Compatible — Installs with a manual driver or jackhammer driver kit; uses the HSP-I25 hammer spacer for driving
The I25-850 OZ-Post is a 34" long post anchor designed for 2-1/2" square ornamental steel or aluminum fence posts. Instead of digging post holes and pouring concrete footers to secure your posts, the I25-850 drives in the ground either manually or with a jackhammer. OZ-Post anchors have been tested throughout the years to perform as well as concrete, and they have the added advantage of keeping your posts away from direct contact with the wet soil. Each anchor is hot-dip galvanized for rust protection, and the ornamental anchors have an exterior-grade powder coated sleeve that holds the post. It is recommended to leave about an inch of the sleeve above the ground, which makes it easier to insert screws to hold your posts in place.
One of the best things about using OZ-Post anchors is that you don't have to wait for your concrete to set, which means that you can get your posts in the ground immediately and start putting up your fence sections. Whether you are a Do-it-yourselfer, or a professional fence installer, you'll appreciate the time and labor savings that come with using these anchors.
OZ-Posts are great for temporary projects too. The post anchors can be pulled out of the ground and reused for different projects.
There are 2 ways to install I2-850 Post Anchors:
1) Use the Manual Driving Kit (MDK-13) and an HSP-I25, which uses its own weight & gravity to do most of the work of driving the anchor down into the ground. This is good for a small to medium number of posts.
2) Rent a jackhammer and purchase a Jackhammer Driver Kit (JDK) and an HSP-I25 Spacer to drive your posts into the ground. This usually takes one person about 4 minutes per post, and is the most efficient way to install all OZ-Post post anchors.
Why Choose This
- Speed & simplicity — No excavation, forms, or cure time; start building immediately
- Neat finish — Black sleeve maintains the ornamental look at grade
- Built to last — Hot-dip galvanizing and elevated post base help reduce corrosion over time
Specifications
| Model / Item # | I25-850 (OZ-Post® Ornamental), Item 30340 |
| Fits Post Size | 2-1/2″ × 2-1/2″ square steel or aluminum posts |
| Overall Length | 34″ (drive nearly flush; leave ≈3/4″ sleeve exposed) |
| Sleeve Length | Approx. 5.4″–6″ (black powder-coated) |
| Material / Finish | ~2 mm hot-dip galvanized steel body; black powder-coated sleeve |
| Weight | Approx. 7.8–8.0 lb each |
| Included | I25-850 post anchor (post fasteners sold separately) |
| Driver Options | MDK-13 Manual Driver Kit or JDK-10 Jackhammer Driver Kit; HSP-I25 hammer spacer required when driving with kits |
| Typical Usage | Ornamental steel/aluminum fencing, ornamental sign posts, wayfinding/street signs |
Installation
Lay out post centers and call 811 to locate utilities. Using a manual driver or jackhammer driver kit with the HSP-I25 spacer, drive the I25-850 to grade leaving approximately 3/4″ of sleeve exposed. Insert the 2-1/2″ post, check plumb, and secure through the sleeve with exterior-grade self-drilling screws. In rocky soils, pre-drilling may be required; solid bedrock typically calls for an alternate footing. Follow your fence system’s rail/bracket instructions to complete the panel install.
Resources: Manufacturer’s Warranty
Buying Guide
- Choosing length & size: This 34″ anchor is sized for 2-1/2″ posts. For 2″ posts use the I2-850 (2″ × 2″); for 3″ posts use the I3-850 (3″ × 3″).
- Tools & accessories: For runs of multiple posts, a jackhammer driver kit is fastest. When driving the I25-850, use the HSP-I25 spacer for proper engagement.
- Surface finish: Black sleeve blends with most black ornamental systems; touch-up paint may be used at fasteners if desired.
Frequently Asked Questions
- Do I need to set posts in concrete?
- No. This is a drive-in system designed to eliminate digging and concrete in qualifying applications.
- How much sleeve should show above grade?
- Leave roughly 3/4″ exposed so you can drive fasteners and maintain a clean finished look.
- Are screws included?
- No. Use exterior-grade self-drilling screws sized for your post wall thickness.
- Which spacer do I need with a driver kit?
- Use the I25 hammer spacer when driving this model with manual or jackhammer driver kits.
- Will it work in asphalt or rocky ground?
- Often yes. Many installs can be driven through asphalt and around small rocks; solid rock usually requires pre-drilling or a different footing.
Comparison
| Option | Strengths | Considerations | Best For |
|---|---|---|---|
| I25-850 (34″, 2-1/2″) — this item | Sized for 2-1/2″ posts; neat black sleeve; no concrete | Requires I25 hammer spacer when using a driver kit | Taller panels, light commercial runs, sign posts |
| I2-850 (34″, 2″) | Same depth for smaller 2″ posts | Not for 2-1/2″ posts | Standard 2″ ornamental systems |
| I3-850 (34″, 3″) | Fits heavier 3″ posts | Larger profile | Heavier ornamental or signage |
Not sure if the I25-850 is the right match for your post size, fence height, and soil conditions? Contact us and we’ll help you choose the correct anchor, spacer, and driver kit for a clean, long-lasting installation.
