The Knipex 44 21 series of internal bent circlip pliers are constructed from chrome vanadium solid style forged top quality steel with precision non-slip tips for added strength and durability. Like most of the Knipex range of pliers, all components are oil hardened with polished heads and plastic coated handles. Knipex circlip pliers are ideal for all trade or DIY applications and especially the automotive trade. 44 21 J11: Bore Size: 12 - 25mm.44 21 J21: Bore Size: 19 - 60mm.44 21 J31: Bore Size: 40 - 100mm.Length 170mm ( 6 3/4 in).Size of bore 19-60 mm.