ZeroTech Throw Lever (ZTA-THROW) fits the following ZeroTech riflescope models.

• Trace Advanced 4.5-27×50 FFP (TR4275F)
• Trace 3-18×50 SFP (TR3185R3)
• Trace 4.5-27×50 SFP(TR4275R3)

A 2mm hex key is required to fasten the throw lever to the dovetail on your scope.