The internal force can be mainly divided into carbon steel and stainless steel. Carbon steel is generally subject to blue zinc plating and yellow zinc plating. At present, the market is dominated by blue white zinc plating. The other is made of stainless steel 304. The surface color is generally the natural color, and some are passivated, which can be customized according to customer requirements.

There are two sizes of internal expansion screws, metric and imperial. The metric size is mainly M6 M8 M10 M12 M16 M20, and the imperial size is 1/4 5/16 3/8 1/2 5/8 3/4 7/8 1

Drop-In anchors are female concrete anchors designed for anchoring into concrete. Drop the anchor into the pre-drilled hole in the concrete. Using a setting tool expands the anchor within the hole in the concrete. Drop-in anchors require a setting tool to install.

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