stepped cavity mould
1Dornier Do 17 — Do 17 A formation of Dornier Do 17Zs, circa 194 …
2Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry …
