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. KPX4421J21