Remember, NEVER hit the tip of an Allen key with a hammer; the elasticity of the Allen key will make it bounce back, hence absorbing the energy of the hammer.

You only need one kit and one hex key to create unlimited rides for their whole childhood.

get hold of a fat 8 mm Allen key, or even a 6 mm Allen key, with the right adapter for the diameter of the pedal screw (8 mm)

The idea consists in multiplying the lever effect - technically called the torque - initially produced by the Allen key, by plugging an extension onto it.

Vertical adjustments (Fig. 4) are made by adjusting the height of the foresight by adjusting the screw in front of the sight with 2 mm Allen key.

They're screwed on the marked reglets with an Allen wrench, right against the vertical arm AND the Xtension plate supporting the camera once set.