A set of 12 single sided cone wrenche the single sided cone wrench has a remarkable toughness hardness durability and tight fit the ergonomic shape ensures good functionality the cone wrench sits perfectly in the hand which makes the work fast and comfortable 13 14 15 16 17 18 19 20 22 23 24 28mm material special tool steel hardened and tempered surface finish chrome plated according to en12540 double plastic dipped handles