# QZER Detachable 4x4 Post Base, 2-Pack

Pack: QZER Detachable post bases are sold as a two-piece set for securing wood posts to concrete or wood floors. Their listed inner-size adjustment range and included fasteners may suit fence, railing, mailbox, or pavilion projects, but confirm the post fit and mounting surface before installation.

- [Original product page](https://best-deals.pro/product/qzer-detachable-adjustable-4x4-post-base-2-pack)
- [View offer](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)
- Market: US
- Language: en-US
- Currency: USD
- Brand: QZER
- Model: Detachable
- Category: Tools & Garden > Hardware & Building Materials
- Price: 20.99 USD
- Previous price: 29.99 USD
- Discount: 30%
- Price checked: 2026-11-14T07:01:58.506Z
- Rating: 4.2 / 5
- Reviews: 58

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Adjustable and detachable design is described as fitting wood stakes with inner dimensions from 3.3 to 4.3 inches.
- The listing describes installation on concrete or wood floors without burying posts or pouring concrete.
- The seller claims the powder-coated steel surface is waterproof and rust-resistant.
- Listed applications include deck railings, patio posts, fences, gazebos, and mailboxes.

## Pros

- The adjustable inner size can accommodate posts of different widths within the stated range.
- The stated floor-mount approach avoids digging and concrete pouring, according to the listing.
- The listing claims that hardware is supplied for both concrete and wood-floor installation.

## Specifications

### Identity
- Brand: QZER
- Model: Detachable
### Dimensions and installation
- Mounting type listed: Floor Mount
- Dimensions listed: 4.33 x 3.54 x 9.84 inches
- Weight listed: 4.87 kg
### Materials and finish
- Material listed: Alloy Steel 4130
- Color: Black
- Finish: Powder Coated
### Adjustability and applications
- Adjustable inner size claimed: 3.3"to 4.3"
- Set name: 4x4 Post Base 2 Pack

## Before you buy

- The listing describes a two-piece set and claims the inner size adjusts from 3.3 to 4.3 inches, while the title also states 3.6" x 3.3"-4.3". The precise fit dimensions are therefore inconsistent in the listing. Confirm the intended post size and actual bracket measurements before buying. Its waterproof and rust-resistant descriptions are manufacturer claims, not independently verified performance.

## A good fit for

- DIY projects attaching wood posts to concrete or wood floors without burying them.
- Buyers needing a pair of adjustable brackets for fences, railings, gazebos, or mailbox posts.

## Less suited to

- Projects that require a confirmed fit outside the stated 3.3-to-4.3-inch adjustment range.
- Installations needing a verified structural load rating, since none is supplied here.

## Customer feedback

Aggregate ratings lean positive, with most ratings in the top two star categories, but a notable share are three-star and some are two-star. Without written feedback, the reasons behind those ratings are unknown. For buyers, the unresolved fit dimensions and unverified performance claims matter more than the overall rating when sizing brackets for a specific post or installation.

## Frequently asked questions

### What is included with the QZER post base set?
The title identifies a two-piece set. The feature text also claims a wrench, concrete expansion screws, wood screws, drill sockets, and bolt-and-nut sets. Check the selected listing to confirm the package contents.
### What post sizes does it fit?
The listing says the inner size adjusts from 3.3 to 4.3 inches, but its title also gives a separate 3.6-inch dimension. Confirm the bracket's actual fit before ordering.
### Can it be installed without pouring concrete?
The listing says it mounts to concrete or wood floors without burying the post or pouring concrete. The selected fasteners and mounting surface still need to suit the installation.
### Is the post base rust-proof?
The seller describes its powder-coated surface as waterproof and rust-resistant. This is a listing claim, not a verified performance guarantee.

## Alternative options

- [VredHom Outdoor Umbrella Base, 43lbs Heavy Duty Patio Umbrella Stand \| Square Concrete Base, Suitable for 6-12FT Most Market Umbrella, for Deck, Lawn, Poolside](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)
- [Wocepu 1 Pack Heavy Duty Stainless Steels U-Shape 4"x4"\(Actually 4"x4"\) Wet Concrete Fence Post Holder, Psot Base, for Fence, Deck Railing, Pergola Wood Post Bracket Anchor \(Dark Grey\)](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)
- [JOINHOM 45lbs Patio Umbrella Base with Wheels, Heavy Duty Stand Outdoor \| No sand/water filling, Easy to Move, Wind-resistant, Square Concrete Stand, Fits 6–12FT Market/Fringe umbrellas](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)
- [PURPLE LEAF Large Patio Umbrella with Base 10' X 13' Outdoor Umbrella Taupe \| Double-Top Canopy Stays Stable in Gusts, Built to Last, 240 GSM Fabric, 99% UV Protection, 6-Position Adjustable Tilt Angle](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)
- [Jentafix 10x13' Cantilever Patio Umbrella with Base for Outdoor, Grey \| Large Rectangular Heavy Duty Offset Umbrellas with 360° Rotation & Double Top & Mutil Tilt Adjustment for Garden Deck Pool](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)
- [4x4 Post Base 5 Pcs Heavy Duty Steel Brackets Internal 3.6" x 3.6" \| Heavy Duty Steel Deck Post Base Cover Fit for 4 x 4 Standard Wood Post Anchor Deck Base Plate](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)
- [VredHom Patio Umbrella Base with Wheels, 43lbs Outdoor Umbrella Stand \| With 2 Wheels, Square Heavy Duty Base, Suitable for 6-12FT Market & Fringe Umbrella, for Deck, Lawn, Poolside](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)
- [VEVOR 4x4 Post Bracket, 4PC Post Base Brackets, Inner Size 3.6"x3.6" Heavy Duty Powder-Coated Post Anchor Matte Black Wood Post Brackets for Pavilion Deck Railing Support Deck Base Plate](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)
- [Wocepu 2 Pack Heavy Duty Stainless Steels U-Shape 4"x4"\(Actual 3.5"x3.5"\) Wet Concrete Fence Post Holder, Psot Base, for Fence, Deck Railing, Pergola Wood Post Bracket Anchor \(Dark Grey\)](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)
- [4"x4" Adjustable Post Base, 2Pcs，Stainless Steel Post Anchor Bracket \| Internal 3.5"x3.5", Adjustable Post Base for Pavilion Deck Porch Handrail Railing Support Decorative Anchor Plate.](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)
- [VEVOR 8"x 8" Post Base, 4Pcs Stainless Steel Adjustable Post Anchor Bracket\(Internal 7.8 x 7.3"\), Adjustable Post Base for Pavilion Deck Porch Handrail Railing Support Decorative Anchor Plate](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)
- [4x4 Post Base 10 Pcs, Deck Post Base,Heavy Duty Post Anchor Brackets \| Inner Size 3.6"x3.6" Heavy Duty Powder-Coated Post Anchor Black Wood Post Brackets for Decking Porch Railing Support](https://best-deals.pro/visit/qzer-detachable-adjustable-4x4-post-base-2-pack)

## Images

![QZER Detachable 4x4 Post Base, 2-Pack — 1](https://best-deals.pro/i/GJP1taJOOmkr1BFwKEDVsN_no05YeST7E3sWAn7uGuz8EifaAqKCVPjaVn1Y69Ovr2j1miDEnAm2KDxleXRZzdirHfQHb_YdbugfWyBWzz_K9bDX.jpg)

![QZER Detachable 4x4 Post Base, 2-Pack — 2](https://best-deals.pro/i/83UlAEcPGhEwWXg4694vcwtJAYvGXfeho53I5x-HS58qFXN-29_xG0O2gpq7RECRuuvQwRwre9FPZUTtKt3w_lMHpxN0YSlLbCldRakr_NVENms-FjG7daqt.jpg)

![QZER Detachable 4x4 Post Base, 2-Pack — 3](https://best-deals.pro/i/GHxrUVpcU9atiEN7Ubr7QutvdjIihv_aEl9WDLUvkN4-zCgQruWexy73FUUZWNs8iyrqKG6SW7Bo8a9JA1lANNgr0dQ1WwOsT7C6vypNZn0mj2hr8wkXRQJ_.jpg)

![QZER Detachable 4x4 Post Base, 2-Pack — 4](https://best-deals.pro/i/i6NCWfeMaGux5Oj-Xr6MUpW2mI5YGChv2o_8HjyWY7Q_ZUNaZIvOW3XgCzpdtwHadv73knm78Mv49gl5XqWk3-jq77msOcS21at7PEoipFZKRrMIq6thOpKi.jpg)

![QZER Detachable 4x4 Post Base, 2-Pack — 5](https://best-deals.pro/i/Nv21gkRhH7AckLHrEGP3fm1URGpxs90CG4mHD5uvjY02kt0OhR6rmLCNn9hl7zt14iccmgeA5pZ03HgeDFLpk5HVT5aHNv8QLeVlnhz5Mb9K0J--Xj48YaqB.jpg)

![QZER Detachable 4x4 Post Base, 2-Pack — 6](https://best-deals.pro/i/c3gOC90pCe2uz3boInmyZOvBrw8azY_j5aAU9Mqb1GmxfdVFxgcXWdtA_fXaRzUTsA_FCiV4o3TqanwTxlmRAHQl9XMxsNegcZZfJblRADQItzlH3FMOCCBa.jpg)

![QZER Detachable 4x4 Post Base, 2-Pack — 7](https://best-deals.pro/i/BJc_aumENObSXWXR26_21mngcmzUR8Eu6X9_w-6F9730Qd-Qm9z3v3oWR2o4wuYp_23_1c384goOdyOfkx8q8B1nO47tD0sXR8Qf5KrOoZD1f39F1_WYqrBv.jpg)