Lisle 44900 Horseshoe Lock Ring Spreader Pliers

The horseshoe clip is one of those retaining rings that fights you with regular pliers. It sits in a groove and has to be spread open evenly to come out, and a slipped tip either mangles the ring or scars the mating surface. The Lisle 44900 is built for exactly that clip: the jaws seat inside the open end of the horseshoe ring and spread it straight, so it releases in one motion instead of pinging across the shop.

You run into these lock rings all over a vehicle - the cooler line and dipstick tube fittings on automatic transmissions, master cylinder pushrod retainers, brake caliper hardware, and a handful of other spring-clip applications. The jaw tips are knurled so they bite the ring and stay put under spreading load rather than camming off. The handles are contoured for a solid grip when the clip is buried in a tight spot.

Overall length is about 10.5 inches, which gives you the reach and leverage to get at rings set back behind other parts. At roughly 4.8 ounces it is a light, single-purpose tool that lives in the drawer until the day a horseshoe clip is the only thing standing between you and the job. Lisle part number 44900.