Exact spanner radius reduces the risk of nut damageHook spanners HN series Hook spanners HN series The HN series includes 15 different size hook spanners based on the DIN 1810 standard. The hook spanners are designed for use with SKF KM nuts as well as any other KM nuts conforming to the DIN 981 standard. Additionally, they are suitable for use with N, AN, KMK, KMFE and KMT as well as nuts manufactured according to the DIN 1804 standard. Minimises the risk of shaft and nut damagePlastic handle is oil, grease and dirt resistant to provide a better gripThe plastic handle minimises direct metal to skin contact, reducing the risk of corrosion in the handle areaHole in the spanner's handle facilitates easy storageDesignation of spanner representing its size is laser-engraved allowing easy identification and selection