Expansion screw or bolt is a fastener that expands when tightened into a pre-drilled hole, creating a grip in the material like concrete,brick or stone and wood. Using friction to create a secure hold.
There are many types of Expansion screw or bolt,like Sleeve Anchors,Wedge Anchors,Drop in Anchors,Hammer Drive Anchors,etc.
Expansion sleeve bolts can be made in Steel,Stainless steel.
Stainless steel are used in many industries,Such as oil and gas, chemical processing, and power generation.

Related products supplied by enyoo hardware company are as shown in the figure

We are a professional Fastener manufacturer with a history of more than 20 years. Due to the large variety of screws, if you have other categories of standard parts and non-standard parts inquiries, please email us directly or contact us online. Looking forward to your contact.