Drill Bit Collection Appraisal

Vintage 12-Piece DHH High-Speed Straight Shank Drill Set in Metal Tin

This item is a vintage set of 12 high-speed straight shank drill bits, housed within a rectangular metal tin. The drills are predominantly a dark silvery-gray color, indicating they are likely made from high-speed steel (HSS), a common material for drill bits offering good heat and wear resistance. They vary in size, from smaller, thinner bits to larger, thicker ones, displaying the characteristic helical flutes used for cutting and clearing chips. The general condition of the drills appears to be used, with some showing signs of wear, minor discoloration, and possibly light surface rust or tarnishing, which is common for older metal tools. One drill bit, more visibly, appears to have a square-shaped shank end. The metal tin itself is a simple rectangular form, unpainted and showing signs of age, including scratches, scuffs, and possibly some patina on its surfaces. A significant distinguishing feature is a yellowish-brown paper label with black text, suggesting it is original to the set. The label specifies '12 PIECE', '.50 DIAMETER', 'DHH HIGH SPEED STRAIGHT SHANK DRILLS', 'NT SXL TYPE 350 B', and '135 SPLIT POINT'. This precise labeling indicates a specific manufacturing specification and likely dates the set to a period where such detailed information was commonly provided on packaging. The presence of the original tin and label adds to the completeness and historical value of the set. The craftsmanship appears functional and utilitarian, as expected for industrial or workshop tools.