The 40-694 20 in. variable speed scroll saw is designed for quality and precision. The large, cast-iron table provides excellent material support and bevels 0° – 45° left and right. The unique dual parallel-link arm design reduces vibration and noise and keeps the blade perpendicular to the work surface which dramatically reduces over or under cutting, improving accuracy and quality. The single lever, tool-free blade tensioning allows for quickly adjusting the blade to the proper tension which maximizes blade life and accuracy.