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. The extra long bolt extractor can help you work on the most challenging projects from narrower and deeper spaces, making up for the lack of other short extractors.