If you have a TORK mechanical timer that's missing some trippers, this Dreyoo replacement kit is exactly what you need. You get 5 silver ON trippers and 5 black OFF trippers plus 10 screws - plenty to replace missing or broken ones. The compatibility is great - works with TORK 1100, 7000, and 1800 series timers, which are super common for pool pumps, lighting systems, and other automated equipment. The color coding makes setup intuitive - silver for ON, black for OFF. Installation is simple - just position them on the timer dial where you want the cycle to start and stop, then secure with the included screws. The screws are longer than some cheap replacements, which means they actually stay put. The material feels durable and should hold up to outdoor conditions without corroding. I used these to fix my pool timer that had missing trippers, and it's been working perfectly for months. Much cheaper than replacing the whole timer unit, and they work exactly like the originals. Definitely a smart fix for anyone maintaining mechanical timers around their home or business.