Size: The sizes of the four wrenches are 3/4” to 2”, 1-1/4” to 3”, 2”to 4-3/4”, and 4-1/2” to 6-1/10”. ATNHYING Hook Wrench Tools equipped with square, circular and special heads, the diameter of the replacement head is 3mm, 4mm, 5mm, 6mm and 8mm, they can adapt to most nuts. Spanner Wrench Sets Include: 11pcs Replaceable Head(4pcs round Head, 4pcs square head, 3pcs round head with special diameter size); 4pcs Spanner Wrench; 1Pc Hex Wrench; Material: ATNHYING Adjustable Spanner Wrenches are made of high-quality high-carbon steel material, after heat-resistant treatment, more durable. And the head of the wrench has been reinforced. Application: The C-shaped design can better fit the exterior of the nut, different shapes of heads can be used for different grooves.Widely used in various industries to fasten or remove round nuts on machine tools, vehicles, and mechanical equipments. Tips: During use, choose the appropriate size. Do not use small wrenches instead of large ones. Because different specifications adapt to different hardness levels. ATNHYING 12pcs Adjustable Spanner Wrench Sets with Replaceable Head, C-Shape Pin Hook Wrench Tools for Pipes Heating Cars, Castle Buffer tube Nut Coilover Wrench for Suspension System, 3/4" to 6-1/10" Size: The sizes of the four wrenches are 3/4” to 2”, 1-1/4” to 3”, 2”to 4-3/4”, and 4-1/2” to 6-1/10”. ATNHYING Hook Wrench Tools equipped with square, circular and special heads, the diameter of the replacement head is 3mm, 4mm, 5mm, 6mm and 8mm, they can adapt to most nuts.