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="//agdetail.image-gmkt.com/m430/707/307/842307707/img/agdetail.image-gmkt.com/707/307/842307707/img/img6.eachbuyer.com/x9/p100/eb01072_1.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/707/307/842307707/img/agdetail.image-gmkt.com/707/307/842307707/img/img6.eachbuyer.com/x9/p100/eb01072_2.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/707/307/842307707/img/agdetail.image-gmkt.com/707/307/842307707/img/img6.eachbuyer.com/x9/p100/eb01072_3.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/707/307/842307707/img/agdetail.image-gmkt.com/707/307/842307707/img/img6.eachbuyer.com/x9/p100/eb01072_4.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/707/307/842307707/img/agdetail.image-gmkt.com/707/307/842307707/img/img6.eachbuyer.com/x9/p100/eb01072_5.jpg" />