The Grand Master Z-Tool System from Slide Lock Tool Co. Inc., is the most comprehensive yet easiest to use automotive lock out system available in the industry today. With over 25 years of tried and tested research using only the finest materals available the Z-Tool System has only 14 tools which unlocks the whole history of cars and trucks. Our instruction manual is fully illustrated, easy to use, fits in one hand and has no equal. In the competitive market of automotive lockouts MORE IS NOT BETTER! We believe in our motto: KEEP IT SIMPLE. For more information please visit our web site at www.z-tool.com or call us at 800-336-8812.