Features: Made by premium quality material aluminum, anti-rust, anti-corrosion and not easy broken. This shift knob extender is highly adjustable, shifter height is adjustable. The offset elbow of the shifter can be rotated to several different positions. The material of shift knob extender is aluminum that can reduce friction and make shifting even smoother. Thread specifications: M8 * 1.25, M10 * 1.25, M10 * 1.5, M12 * 1.25. Extension rod thread specifications: M10*1.5; Gear shifter thread specifications: M12*1.25. Gear shifter (adapter) Thread specifications: M8*1.25, M10*1.25, M10*1.5. Note: 1.Professional installer is highly recommend, No installation instruction included. 2.Please allow 0.1-0.2cm difference due to manual measurement. 3.Please check the size to make sure this product is what you need exactly. Specifications: Material: Aluminum & Stainless Steel Color: Black & Silver Size: 190*65*65mm / 7.48*2.56*2.56in Weight: 390g / 13.76oz Package List: 1 * Shift Knob Extender 4 * Adapters 4 * Screws 1 * Wrench