Stahlwille Series 13A Combination Spanners. AF Imperial, with 15° offset ring end. Drop-forged from high-grade chrome alloy steel and chrome plated. The spanners are optimally hardened in continuous furnaces with no scale build-up or skin decarburisation and gently quenched in oil. They are extremely strong yet lightweight due to Stahlwille’s ‘double-T profile’. Stahlwille’s unique plating method prevents the problem of chrome flaking. The spanner’s ring ends are equipped with an Anti-Slip Drive profile to permit high transmission of forces to the flats of the nuts and bolts without damaging them. Made in Germany.