Size——Width:24mm/0.94"; Outer Diameter: 9mm/0.35"; Inner hole square: 5mm/0.2" Package Include: 10pcs Square Radiator Key Heavy-Duty Zinc Alloy Construction: Crafted with premium zinc alloy, these radiator valve keys resist bending/breaking. Ideal for stuck valves in old radiators, 5x5mm square hole, thick and suitable for long lasting use Universal Fit for All Radiator Systems: Precision-milled 0.2"x0.2" square head fits most US radiators (Myson, Honeywell TRVs, cast iron heaters). Multi-Purpose Plumbing Tool: Suitable for radiator bleeding, Adjust faucet cartridges, gas valves, and irrigation systems and so on. Features:
Radiator Valve Key Heating System Universal Square Radiator

Specification:
Net Weight:70g
Material:Metal
Size——Width:24mm/0.94"; Outer Diameter: 9mm/0.35"; Inner square: 5mm/0.2"

Package Includes:
10pcs Square Radiator Key