Set of watchmakers' screwdrivers on swivel stand. See list below for individual screwdrivers and blades. Blades are sold by the dozen. 52.550 Screwdriver (Brown). 52.560 Blades (diameter .118" / 3.00mm) 52.551 Screwdriver (Blue). 52.561 Blades (diameter .089" / 2.50mm) 52.552 Screwdriver (Green). 52.562 Blades (diameter .078" / 2.00mm) 52.553 Screwdriver (Purple). 52.563 Blades (diameter .063" / 1.60mm) 52.554 Screwdriver (Gray). 52.564 Blades (diameter .055" / 1.40mm) 52.555 Screwdriver (Red). 52.565 Blades (diameter .047" / 1.20mm) 52.556 Screwdriver (Black). 52.566 Blades (diameter .039" / 1.00mm) 52.557 Screwdriver (Yellow). 52.567 Blades (diameter .031" / 0.80mm) 52.558 Screwdriver (Lilac). 52.568 Blades (diameter .024" / 0.60mm)