Sure-Lock® EKG Electrode Clips. Sure-Lock® "Clear Choice" Electrode Clip is more secure than traditional button snaps and easier to use than pinch clips. Securely attaches to both snap and tab electrodes, reducing the potential for disengagement and lost ECG signals. This ergonomic design can be applied easily with one hand, without applying pressure on the electrode site, improving patient comfort. 10 clips per pack. Priced per pack.