This is the Rudder Assembly from Hobbico for the Nitro Hammer Boat.
FEATURES: Black plastic rudder with screw lock connector
Aluminum mounting bracket
Two 3x10mm round head screw
Two 2.6x8mm self-tapping screw
Two 2.6mm lock nut
INCLUDES: One rudder assembly
REQUIRES: Installing on hull
SPECS: Length: 3.5" (88mm) rudder only
Length: 4.75" (120mm) rudder and mounting bracket
Width: .98" (25mm) at widest point
Thickness: .14" (3.7mm)
COMMENTS: Will work only for the Nitro Hammer boat