Dubuque Clamp Works is a small family run business dedicated to producing the finest clamps made. They have handscrews which are preferred by cabinetmakers as they will not mar the work surface and apply a broad area of evenly distributed pressure or concentrate pressure at a single point. The bodies are the finest quality hard maple. True, deep cut Acme threads provide maximum engagement and low friction. All metal parts are plated to prevent rust. The extra large handles have heavy steel ferrules pinned to the spindles.