The holes are aligned consistently; each row and column has corresponding letters and numbers, easy to insert pins. You can just leave your circuit on the breadboard if you don't want to transfer it to a perfboard or a PCB. The solderless breadboard in the breadboard kit is suitable for DIY , you can use it with breadboard jumpers and breadboard power supply for DIY... The solderless breadboard in the breadboard kit is suitable for DIY , you can use it with breadboard jumpers and breadboard power supply for DIY, testing, experiments, robots, toys and games.SpecificationMaterial: ABSSize: 20* 31*10mm / 0.79*1.22*0.39 inch (W*L*H)A terminal strip: 55 jackAdvantageEasy to fix breadboard jumpers, easy to use breadboard holder, suitable for pi breadboard kit. NOTE:Our store has different styles, sizes and colors to choose from. Zy-55 Points Solderless Pcb Breadboard Mini Universal Test Solderless Breadboard Canada PATIKIL 7pcs Mini Breadboard, Solderless Breadboard 25 Small Breadboard The solderless breadboard in the breadboard kit is suitable for DIY , you can use it with breadboard jumpers and breadboard power supply for DIY, testing, experiments, robots, toys and games. MX-M Microplate Mixer •Wide range of speed from 0 to 1500 rpm (Double microplate:0-1000 rpm) •Excellent performance with electronic speed control •High speed InstructionThe connectors are nice and has a good grip.