The HAZET internal square (Robertson) socket insert is a high-quality tool specifically designed for use with fill and drain plugs of transmissions, differentials, and oil pans. With an internal square drive of 12.5 mm (1/2 inch) and a key width of 10 mm, this insert provides a precise fit and reliable power transmission. The total length of 36 mm allows for easy handling in tight spaces. Made from robust chrome-vanadium steel and featuring a chrome-plated surface, this socket insert is not only durable but also corrosion-resistant. The careful craftsmanship and use of high-quality materials make it an indispensable tool for professional applications and hobby mechanics.

• Made from chrome-vanadium steel for high durability
• Chrome-plated surface for additional corrosion protection
• Suitable for fill and drain plugs of transmissions and oil pans
• Precise internal square drive of 12.5 mm (1/2 inch)
• Compact total length of 36 mm for easy handling in tight areas.