Advantages: Inexpensive spring clamp with sufficient clamping force for most 90 degree elements. Ideal for most woodwork. Cons: Tips are unevenly sharpened (some are pointed, some are rounded, which some might consider a feature). Clamp strength may not be sufficient for angle cuts other than 90 degrees. For those with larger needs, consider digging into your wallet and buying some expensive Collins Miter spring clamps.