The set includes 5 extractors in sizes 3-6 mm, 6-8 mm, 8-11 mm, 11-14 mm, 14-18 mm. Made of high-quality tool steel. Sizes: 3 - 6 mm 1/8"-1/4" 6–8 mm 1/4"–5/16" 8–11 mm 5/16"–7/19" 11–14 mm 7/19"–9/16" 14-18 mm 9/16"-3/4"Specification: Quantity: 5 pcs. Material: tool steel Package dimensions: 5.2 x 9.3 cm