Qarcmq Adjustable House Floor Jack 11.5-20 Inch
- Load Capacity: 10000 Pounds
- Minimum Height: 11.5 inches
- Maximum Lifting Height: 30 inches
- Compatible With Vehicle Type: House Floor Jacks For Leveling
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A shorter-range, rust-resistant leveling post suited to attic and roof beam gaps rather than a tall basement span.
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ASIN: B0GKNXQ7CHCategory: Floor Jacks
Overview
Qarcmq's leveling jack adjusts through roughly an 11.5 to 20 inch range using a bidirectional M27 thread, rated to 10,000 lbs for attic, roof beam and stair platform support.
Its mechanism differs from the lever-and-pin posts above: the M27 thread runs both directions, so turning the handle either extends or retracts the post, then a hex nut locks the chosen height. Carbon steel construction with AWS arc-welded joints and an anti-rust spray finish point it toward damp, unfinished spaces like attics and crawlspaces rather than a finished basement.
- 10,000 lb rated capacity
- Bidirectional M27 threaded adjustment
- AWS arc-welded steel joints
- Anti-rust spray coating
Who it's for
Works for leveling a shorter gap in an attic, under a roof beam or on a stair platform, in a damp or unfinished space where rust resistance matters more than maximum height.
Pros and cons
- Bidirectional thread speeds up adjustment
- Anti-rust coating suits damp spaces
- 10,000 lb rated capacity for its size
- Shorter adjustment range than full basement posts
- Locking relies on a hex nut, not pins
Performance notes
Turning the handle on the bidirectional M27 thread moves the post in either direction without fully unscrewing it, and a hex nut locks the height once set. The anti-rust spray is meant to penetrate the steel surface rather than sit as a coating that can chip, and the AWS arc-welded joints are built to resist cracking under the rated 10,000 lb load.
Specifications
| Brand | Qarcmq |
|---|---|
| Dimensions & fit | |
| Minimum Height | 11.5 inches |
| Maximum Lifting Height | 30 inches |
| Item Weight | 4.5 pounds |
| Item Dimensions | 20 × 5 × 5.1 inches |
| Capacity & performance | |
| Load Capacity | 10000 Pounds |
| Construction & materials | |
| Material Type | Carbon Steel |
| Color | Blue |
| Compatibility & installation | |
| Compatible With Vehicle Type | House Floor Jacks For Leveling |
| Included components | |
| Unit Count | 1 |
| Included Components | Alloy Steel Pipe |
| Warranty & support | |
| Manufacturer Warranty Description | 1Year |
| Other details | |
| Automotive Fit Type | Universal Fit |
| Number Of Items | 3 |
| Item Highlight | Bidirectional Thread Adjustable Jack With 10000lb Load Capacity For Attic, Roof Beam & Stair Platform, Rust Proof |
Frequently asked questions
What height range does the Qarcmq 20IN jack post cover?
Roughly 11.5 to 20 inches per the listing, set by turning the bidirectional M27 thread.
How much weight is it rated to hold?
Up to 10,000 lbs according to the listed specs.
Where is this jack meant to be used?
Attics, roof beams and stair platforms, with an anti-rust coating for damp or unfinished spaces.