VEVOR Gas Powered T Post Driver, 37.7cc 4-Stroke Engine Efficient Post Pounder with 3 Piling Sleeves, Vibration-Reducing Handle, Heavy Duty Fence Pile Driver for Farm, Orchard, Road Work, Landscaping

That probably won't work—it's too deep, and there's too much resistance. If this answer does not resolve your issue, please contact us again for assistance.

We recommend wear‑resistant and high‑temperature‑resistant lithium‑based solid grease made by Shell.

Based on the soil type, it should be possible. However, if the soil is particularly hard and contains rocks, we are not so sure. If this answer does not resolve your issue, please contact us again for assistance.

No, this gas post driver is designed for round or T-post fencing posts and is not suitable for 2" × 2" square steel posts.

Yes, this product can drive 4×4 posts.