Arrma Safe-D5 Steel Mod 0.8 Pinion Gears feature a D shaped hole that locks onto the motor shaft and helps to prevent the loss of drive and brakes if the set screw backs out. These gears are machined from steel for durability and fit 5mm motor shafts.
Strong and durable steel for long-lasting performance in extreme RC conditions
Precision manufactured wide tooth profile for smooth operation
'D' shaped hole to match motor shaft profile so drive and brakes are not lost if the set-screw backs out