Feature 1Applicable Range: With various collets for a broad expansion range from 15/8in to 41/4in. Includes: Steel expander 1 5/8in2in Collet, Steel expander 2in2 1/2in Collet, 2 3/8in2 3/4in Collet, 2 3/4in3 1/8in Collet, 3 1/8in3 1/2in Collet, 3 1/2in3 7/8in Collet, 3 7/8in4 1/4in Collet. 2Automatic Pipe Expansion Kit: This tool kit provides the convenient collets and expanders needed to stretch tail pipes before making tight seals to pipes with smaller diameters, ideal for home DIY or professional auto shop. 3High Quality Materials: All collets are constructed from aerospace grade 6061 aluminum, while the expander adopts tempered 40CR alloy structural steel, high hardness, ensuring robustness over the long service life. 4Equipped With Storage Box: Ideal for fitting aftermarket exhaust components to standard exhaust pipes, includes a handy tool storage case for easy storage of tools, and easy for you to carry. 5Simple Operation: You just need to choose the appropriate collet, clamp the tail tube, and expand the tube, the operation of our stretcher kit is really simple.Item Type:ExhaustPipeExpanderToolSetMaterial: 6061 Aluminum + Steel AlloyApplicable Range: Suitable for a wide range of extensions from 1-5/8in to 4-1/4inApplication: Universal type for automobiles and motorcyclesCharacteristic:1.This mechanics tool kit provides the handy collets and expander required to stretch tailpipes before making tight seals to pipes with smaller diameters. Perfect for home DIY or professional auto shops.2.The exhaust pipe stretcher offers various collets for wide expansion range from 1-5/8in to 4-1/4in. Includes: Steel expander 1 5/8in - 2in Collet, Steel expander 2in - 2 1/2in Collet, 2 3/8in- 2 3/4in Collet, 2 3/4in - 3 1/8in Collet, 3 1/8in - 3 1/2in Collet, 3 1/2in - 3 7/8in Collet, 3 7/8in - 4 1/4in Collet.3.A depandable bearing adjusts the drive motion and smoothens your pipe stretching process. Resisting deformity under heavy loads, it's a high performance work horse that saves you time and effort.4.If you're looking for the most durable stretcher kit out there, you should know our collets are made of aerospace grade 6061 Aluminum, while the expander drive is built tough with 40CR Structural Steel Alloy, ensuring heavy duty service with Chinese GB standard. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x ExhaustPipeExpanderToolSet (7pcs)1 x Pack of Rubber Ring (14pcs)1 x Storage Box