revolutions of the knob for the full range of adjustment these features make shock 10 user friendly for all levels of experience referring to fig2 3 a digressive piston 51 is illustrated including a steel shim 52 that is mounted on the outside for rebound adjustment and on the inside for compression adjustment a check valve 54 is used to control which direction the oil flows through a shaft 56 a threaded bushing 58 is placed over and end 60 of shaft 56 to contain an o ring oil flows through an aperture 62 and is metered by an inner shaft 64 inner shaft 64 is fitted inside main shaft 56 and is rotated by means of a worm gear set to control the flow of oil through the shaft fig4 6 illustrate an alternative embodiment of the shaft housing with a steel shim according to the present invention a steel shim 52 acts as a check valve an adjustment shaft 68 fits into a shaft housing 66 and controls the amount of shock fluid that can pass through shaft 68 is rotated by means of the worm gear set that is mounted into a cap that shaft housing 66 fits into fluid is free to flow back to main shock body through an aperture 70 the modified mono tube design of shock 10 described above results in several advantages over the conventional shock including shaft position u2014 a slotted disc allows oil to pass freely through piston 20 because of the addition of a steel shim 52 that prevents oil from.