11Pc spiral deep extractor set sizes: 1/4" (6mm), 5/6" (8mm), 3/8", 7/16" (11mm), 1/2", 9/16" (14mm), 5/8" (16 mm), 11/16", 3/4"(19mm). 1 x 9cm extractor rod and 1/4" (6.5cm) extractor extension. Each extractor is precision-engineered so you can keep working on your most challenging projects.