Description: -As probes, they are used for the drilling of the insulation of wires to allow for automotive electrical measurements without causing damage to the wires. -They can be used as a pin probe of the rush to work with small circuit boards. -The set of 5 probes also comes with 10 pins of replacement; there is no need to replace the entire probe. -Its small diameter, extra pin makes it great for the perforation of the insulation on wires. -It can connect with 4mm banana plug as the following picture show. Specification: Probes color: Black/ Blue/ Yellow/ Red/ Green The probes: 5 pieces The needles of the replacement: 10 pieces Full length of the probe (1 piece): 65mm/ 2.56inch The length of the pin: 37mm/1.45inch Package Includes: 5 pieces probes and 10 pieces replacement needles