Look no further. Great product quality, that's solidly built. Best of all, its very affordable price. Buy today.<br />Head size: 23mm <br />Depth: 30mm<br />Material: aluminum alloy <br />With 2 keys. <br />Note: to ensure safety, keys can be taken out only when it is locked. <br />1 x Lock<br />1 x Hook piece<br />2 x Keys<br /><img src="http://img6.eachbuyer.com/x13/p19/ba008_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x13/p19/ba008_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x13/p19/ba008_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x13/p19/ba008_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x13/p19/ba008_5.jpg" />