The hook spanners of HN ..SNL series are especially designed to facilitate easy and quick mounting and dismounting of bearings with tapered bore on adapter sleeve in SKF SNL and FSNL bearing housings. They are also suitable for tightening and loosening a wide variety of locknuts in both housing and shaft applications. The HN ..SNL series consists of 21 sizes suitable for nut outer diameter ranging from 38 to 145 mm (1.5 to 5.7 in). The HNSNL also fit inside the latest SKF SE housings. The spanners are made of hardened high quality chrome vanadium steel for durability.