Description: Alloy Lock CoreLock core internal use of zinc alloy material, plating art, good wear resistance. External all metal wrap, anti-fall wear, strong anti-violence ability. Complete AccessoriesComplete installation accessories, convenient installation, easy travel, not afraid to lose. These accessories included 4 keys, 2pcs allen wrench and 2 pcs gasket. Reinforced Locking Beam DesignGreat quality metal reinforced beam design, solid as a rock, anti-shear anti-skid. Lock body made of metal, after violence test, anti-skid, rust and durable. Wide Range Of ApplicationsHelmet security lock is suitable for electric car, motrocycle, bicycle and so forth. The applicable pipe diameter:2-2.6cm, so its suit for most models on the market handle diameter. Easy To CarryThe helmet lock is small and compact, so you can take it to anywehere and its easy to lock,no need to worry about someone stealing your helmet. Specification: Material: aluminum alloy, metal Color: black+silver Feature: anti-theft, multifunction Size(approx.): lock(L x W)4.6 x 5.8cm/1.81 x 2.28inch lock ring length:1.3cm/0.51inch lock ring diameter:0.7cm/0.28inch applicable pipe diameter:2-2.6cm/0.79 x 1.02inch(adjustable) Package Included: 2 Pcs x Helmet Lock 2 Pcs x Allen Wrench 2 Pcs x Gasket 4 Pcs x Key Note: 1. Due to the light and screen difference, the items color may be slightly different from the pictures. 2. Please allow 1-2 cm differences due to manual measurement.