M6-M20 Drop In Anchor Expansion Bolt The Drop in anchor. It is simple to install and widely used.It is suitable for installation of heavy load range and installation of inverted lifting system, etc., based on screw and inner tooth fixation, the conical inner plug in the tube is used to fully expand the tube body, so that the body fully expands in the base material, so as to achieve the fixed effect. High Quality Fasteners Details Surface Treatment: Galvanized Packaging: Kraft Carton + Small White Box Or Guest Customization Standard: DIN/ANSI/BS Customization: Can Be Customized Delivery Date: 30 Days Transaction Mode: TT, L/C Origin: HeBei We are a Wood Screw wholesaler.Since the beginning of this century, the company has been engaged in wedge anchor,white zinc plated drop in anchor,Expansion Bolt and custom chemical anchor manufacturing industry, and has won widespread favor and approval.