Feature:1. [100PCS IN 1 SET] Including 100pcs spring test probes, sufficient in quantity, which are easy to use and replace.2. [PRODUCT SIZES] Small round head type, total length is 33.35mm, head diameter is 2.5mm, pin tube diameter is 2.02mm.3. [EXCELLENT MATERIAL] Heat treated brass plunger and stainless steel wire spring, with good contact and corrosion resistance.4. [MAIN PURPOSE] Suitable for gold finger (edge connector) and soldering pad to ensure that no marks are left.5. [LESS INTERFERENCE] The minimum test distance is 3.18mm, the contact resistance is small, and the interference is less.Specification:Item Type: Spring Test ProbesMaterial: Brass, Stainless SteelPurpose: J head type (small round head) is suitable for golden fingers (edge connector) and soldering pads to ensure that no marks are leftHead Diameter: Approx. 2.5mm or 0.1inPin Tube Diameter: Approx. 2.02mm or 0.08inPin Shaft Diameter: Approx. 1.7mm or 0.07inTotal Pin Length: Approx. 33.35mm or 1.3inMinimum Test Distance: Approx. 3.18mm or 0.13inRated Current: 5AContact Resistance: 50m.Package List:100 x Spring Test Probes