slide stopper for semi truck [Premium Materials]This Axle Stop Device is made of high-strength high-quality metal, which has strong performance such as rust prevention, resistance, high and low temperature resistance, impact resistance, wear resistance, etc. It not be after long-term use in harsh environments [Compatibility]This Axle Stop Device is compatible with any semitrailer and refrigerator trailer and dry truck trailer, is a versatile tool for any semi truck driver.That Device offers versatility to cater to different configurations and trailer types [Extension Function]The dual magnetic design of the axle stop device not only has the basic function of locking or unlocking the sliding mechanism, making it compared to single magnet styles on the market, but also can more stably fix the axle without worrying about the risk of detachment during device operation. The redesigned appearance and grip make your operation smoother and more comfortable [Easy Use]Simple design does not require any professional operating skills, just pay attention to whether the device is completely installed in place during use to safety Color: Black Material: Metal Package Contents: 1x Slide Stopper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.