The plastic is cut slightly oversized so when you install it for the first time it deforms where the two rear stays are creating a tight fit. They bounce up and down a bit but side to side they are solid and there's no chance of it falling out. Only thing you need to be careful of is wiggling it about too much as it will make it a loose fit.
The plastic is cut slightly oversized so when you install it for the first time it deforms where the two rear stays are creating a tight fit. They bounce up and down a bit but side to side they are solid and there's no chance of it falling out. Only thing you need to be careful of is wiggling it about too much as it will make it a loose fit.