The Wera 9529 C SB is a 1/2" drive step wrench insert designed specifically for HVAC applications, providing a versatile single-tool solution for working with a range of fitting sizes. Compatible with standard 1/2" ratchets, this step wrench covers five common sizes — 3/8", 7/16", 1/2", 16mm and 21mm — making it well suited to the installation and removal of radiator valves, thermostats, and drain fittings without the need to switch between multiple sockets. Manufactured from chrome vanadium steel, the 9529 C SB offers the durability and hardness expected from a professional-grade tool used in demanding heating and plumbing environments. Features and Benefits: • Five stepped sizes in one insert: 3/8", 7/16", 1/2", 16mm and 21mm • Designed for use with 1/2" ratchets • Chrome vanadium steel construction for long-lasting durability • Ideal for HVAC work including radiator valves, thermostats and drain fittings Contents: 9529 C SB 1/2" Step wrench, 88mm Specifications: Drive Size: 1/2" Steps: 3/8", 7/16", 1/2", 16mm, 21mm Length: 88mm Material: Chrome vanadium steel

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