Our newest shift knob was explicitly designed for new-generation cars. The Chicane shift knob features a stainless steel core, adding heft to an otherwise lightweight design. The boot collar contains a rare earth magnet used to secure the boot to the shift knob without using tools, rubber, etc.This knob is machined from Delrin, which offers a lightweight yet dense knob that feels great in your hand and will withstand extreme temperature changes. Each knob includes a collar of your choice, so there is no need to purchase two separate pieces. The shift boot is secured with an included rubber band that doesn't damage the fabric.46.5 x 61mm Height Delrin with Aluminum boot collar weight: 157g 46.5 x 61mm HeightDelrin with Titanium boot collar weight: 162g46.5mm DIA x 61mm Height - Weighing 230grams. This knob is threaded deep and sits as low as possible on the new generation shifters. Its round shape fits in the palm of your hand precisely and comfortably.