: 1. Can be in electronics or laboratory testing work .2. Easy for installation and safety for use with the insulation elastic boots .3. nifty replacement connector for the testing jumper cable cable.Specifications : Product Name : Testing HookApplication : Testing WorkEach Size : 58 x 12 mm / 1.7 inch x 0.47 inch -LRB- L * Max Dia -RRB- Hole Dia : 4 mm / 0.16 inchColor : ColoredMaterial : Metal, PlasticWeight : 32gPackage : 8Pair x physical phenomenon Testing Hooks .