This 4-piece nut splitter set covers nuts from sizes 0.4" up to 1.06". It is ideal for home / workshop / hobby studios and so much more. It is particularly designed to remove damaged or corroded nuts without damaging the bolt thread. Hardened steel blades and forged grips are manufactured elaborately for strength and durability. All splitters can be used with sockets or wrenches and much more. The set comes in a sturdy case for easy storage and transportation. Material: chrome plated finish and hardened steel body Capacity: Suitable for nuts and bolts of 0.4" - 0.47", 0.47" - 0.63", 0.63 - 0.87" or 0.87"- 1.06". Case material: 10.2" x 7.1" x 2" Dimensions each: 0.4" - 0.47" Nut Splitter Requires 0.4" wrench to tighten. 0.47" - 0.63" Nut Splitter Requires 0.55" wrench to tighten. 0.63" - 0.87" Nut Splitter Requires 0.75" wrench to tighten. 0.87" - 1.06" Nut Splitter Requires 1" wrench to tighten.