Consisting of a full length brass upright graduated pipe upto 200 cm, to be mounted vertically near wall by means of two brackets. A light weight accurate frictionless wheel of 10 cm ala is mounted at its top. Three adjustable clamps move along the rod, upper carrying a ring and lower carrying a plate form and the third on is equipped. with electric release system. The unit is all metallic and complete with two set of failing weights and rider weight.