Ring- lifting expansion eye bolts in the package. These heavy-duty expansion eye rings are made of stainless steel, waterproof, wear-resistant, corrosion-resistant, never rusty and durable. Easy to install. The expansion bolts is formed by tightening the , which pulls out the conical cone to make the sleeve to the hole wall. Select an impact drill bit with the same diameter as the expansion tube of the expansion screw, and then install it on the electric drill to drill holes in the wall. The depth of the hole is the same as the length of the . Application: This heavy-duty control anchor Hardware Tools for Wall Building is suitable for concrete masonry and solid brickwork,ceiling,expansion sleeve anchor heavy duty fixing anchors suitable for fences, anti-theft, doors and windows, rain sheds, air-conditioning fixed, , engineering, etc. Note: Expansion bolts must be installed on a relatively hard base plate, and the soft and easy to off are unstable, such as the space of the lime soil of the wall. All expansion pipes should enter the wall. . As long as the threaded part is long enough, the sleeve part will be and stronger. Ring inner diameter: 16.4mm/0.65inch Thread diameter: 6mm/0.23inch Thread length:80mm/3.14inch Expansion tube diameter: 9.4mm/20.37inch Expansion tube length: 61mm/2.4inch length of expansion : 100mm/3.93inch Colour: silver Material: stainless steel Package Contents: 5 * M8 x 60mm Expansion Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.