EASY TO INSTALL: Just put the bait in the bait cup, press the metal strip on the rear pedestal with your hand, then ready to catch the mouse. You can place the rat rods somewhere where mice usually pass. LARGE SIZE UPDATE: updated version of the mouse rods, the size is 14 x 9.5 x 7.5cm, much larger larger than normal mouse rods (normal size is 9.6x5x4.6cm) .It is more efficient and stronger to catch large mice and rats. SAFE AND POWERFUL: No mouse poison, no tactile design, very safe to use. Large mouse pins have a more precise trigger mechanism and a more powerful spring, much more efficient and sensitive than ordinary mouse pins. REUSABLE AND ROBUST: Rat pins can be used several times. It is made of a durable ABS material that is easy to clean and does not retain any odors or stains like traditional wooden mouse pegs. Friendly reminder: you must be careful when placing the pegs. rats, as the precise trigger and stronger spring can injure your fingers. If you have any questions, please leave us a message and we will give you a satisfactory solution within 24 hours .