When wiring and electrical circuit issues require diagnostic evaluation, the Snap-on 18-Piece Battery and Electrical Circuit Test Lead Kit, No. MTTL550-KIT, includes multiple accessory options to connect to the troubled circuit. The application may require the handsfree 90-degree rigid back probes for limited-access areas or the flexible back probes for terminal insertion at any angle. Specialty hook style adapters fit both large-top and small-side mount battery posts without removing the battery terminals. The adapters simply slide on and stay in place. The kit also includes heavy duty clamps, alligator clips, and an exclusive 68" triple connect lead set all packaged in a convenient roll-up nylon storage pouch.