Features: brand new and high quality Durable: Made of steel material, heavy duty construction, sturdy and durable.The oxidefinish on the set components resists rust and corrosion. The surfacefinish of each part is smooth and provides for easy use under high compression. Easy to use: Close the coilspringcompressor until for touch the center rod, and insert thecompressor into the coilspring. Compressor the spring for removal or installation and only release compression when the spring is set for installation. Compressed spring contain significant stored energy and must be carefully handled and decompressed. Tool Box Storage: Comes with 5 adaptors for various spring diameters, as well as to fit for valve spring correctly for safe and easy compression. Complete 10 pcs parts are well packed and assorted in a plastic box for convenient storage and carry. Function:There are 5 different size adaptors suitable for various spring diameters on most cylinder heads. It allows you to correctly fit the for valve spring and makes it more easier to compressor. C clamp Jaw: Strong and durable. Using 1.7mm thick Heat Treatedsteel with black oxidetreatments,not easy to bend and deform while compressing. And the two end of the 'C' Clamp are alignedin a standard straight line,Not easy to slip during use. Specifications: Weight:1.35kg for Case size: 34x19.5x5cm 5x strong metal collets length(50) 5x strong metal collets diameter (16mm, 19mm, 23mm, 25mm, 30mm) Extension screw 1 size:m13.5x120mm Extension screw 2 size:m13.5x120mm Extension screw 3 size:13.5x70mm 1x springcompressor U-clamp with max jaw opening of 9-1/2 inches Package Includes: 1Set x Installer Removal Tool note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!