Material: 45# carbon steel， quenching process， the hardness is stronger<br />Function: Bicycle tooth disc is removed， the top rod is longer， can remove the square mouth and spline teeth and crank， with a wrench， practical more convenient<br /><img src="http://img6.eachbuyer.com/x9/p100/eb01072_1.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb01072_2.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb01072_3.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb01072_4.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb01072_5.jpg" / noproxy>