Yellow Safety Hammer / Yellow. Tips: Yellow: medium hardness, made of durable, wear-resistant polyurethane. Housing: Powder-coated handles made of ductile iron with a profile that securely holds the tips and handle. Shaft: Hickory handle with an ergonomic profile and non-slip surface. Standards: GS mark: Geprüfte Sicherheit (Tested Safety). Application: Machine and tool construction, metalworking, car repair, sheet metal and assembly work.