- Electrocardiogram divider: Useful kit tool for medical students learning electrocardiograms and rhythms; divider for nursing education; helps visualize and practice ECG patterns and interval measurements in a simple, reliable instrument. - Calipers: Smooth operation for scribing and drawing; very easy and simple to use; ideal for marking precise lines and distances in ECG drafting tasks. - Calipers ruler: Good workmanship and spacing gauge; supports drafting and spacing for electrocardiogram diagrams. - Measuring caliper: Screw-mount design prevents unintentional leg movement; end points are adjustable to the desired length; a dependable medical measurement tool. Use scenarios: 1. In classroom or lab, medical students practice drawing ECG waveforms and measuring intervals. 2. Nursing training sessions use the tools to annotate patient ECG strips and illustrate rhythm identification. 3. Instructors and clinicians draft and compare ECG diagrams for teaching or study.