The portable, multi-directional Man-Saver Pneumatic Post Driver, which runs off any small air compressor that delivers at least 2.5 cfm at 90 psi, reportedly produces 80-85 strokes per minute. Its compact size and relative light weight (26 pounds) makes it especially useful for installing fences at remote locations or in tight spots. It handles round posts from 5/8 to 1.25 inches in diameter and square/rectangular ones up to 1.25 inches across two widest points. It comes with a T-post sleeve that prevents those posts from bending.