Make maintenance and setup adjustments easier with the Tekno RC TKR1103 Hardened Steel Turnbuckle Wrench, featuring both 4 mm and 5 mm hex sizes to fit a wide range of suspension and chassis hardware. Machined from hardened steel for long‑lasting strength and resistance to wear, this compact wrench provides a secure fit on turnbuckles and fasteners, reducing slippage and rounding during tuning sessions. Its dual‑size design eliminates the need for multiple tools, making it ideal for trackside adjustments and routine maintenance on your RC vehicles. Compatible with many Tekno platforms including SCT410, SCT410.3, SCT410 2.0, MT410, EB48, ET48, and more, this wrench is a versatile addition to any racer’s toolkit.