One form of the security apparatus has the security arm hooked on the steering-wheel and the other and of the security arm is connected to the floor hump (A). The security arm has a circular tubing (26) and an insert rod (28) which has a hook at one end slides into the tubing (26). The inserting rod (28) has teeth which lock (31) engages the gaps between the teeth to arrest the inserting rod not to move in or out of tubing (26). A bolt (33) is fixed onto the floor hump (A) with nuts (34) and (35). A U-shaped member (36) is pivotally connected to bolt (33) and a lock with shaft (32) that passes through the ends of the U-shaped member (36) has a short piece of tubing (27) which the shaft (32) also passes through. The tubular arm member (26) connected at one end of the tubing member (27) by preferably weld method. When the security arm is unhooked from the steering-wheel (22) it is pivoted into the form or rubber mould (37) which holds the security arm firmly in place. The security arm can be detached from the U-shaped member (36) by unlocking and removing the lock (30) from the U-shaped member (36).
