Drive size comes first
The square drive must match appropriate impact-rated sockets. A 3/8-inch tool is compact for smaller fasteners and confined areas. A 1/2-inch drive offers broad socket availability and handles heavier work. Larger drives are intended for industrial and heavy-equipment applications.
Fastening versus breakaway torque
Fastening torque describes tightening ability; breakaway or nut-busting torque describes removal under particular test conditions. Marketing numbers are not always directly comparable between brands. Look for repeatable performance in the range your fasteners require.
Compact, mid, or high torque
A compact wrench is easier to control and fit near suspension, machinery, and frames. Mid-torque models balance reach and capability. High-torque models can remove hardware smaller tools cannot, but they are heavier and can damage fasteners if used carelessly.
Anvil and mode controls
Friction-ring anvils make socket changes quick; pin-detent styles can retain sockets more firmly. Speed and auto-stop modes help reduce overtightening or prevent a loosened nut from flying away. Final tightening should follow the equipment specification with a calibrated torque wrench.
Bottom line
Choose around your hardest routine task, not the rarest extreme case. A balanced mid-torque wrench plus a hand torque wrench is more useful for many owners than carrying a high-torque tool everywhere.