We specialized in manufacturing some kinds of construction formwork accessories (construction fastener)such as pin,wedge ,wedge pin,wedge bolt,scaffold coupler ,B-form tie(bolt),B-nut ,D-cone,thread rod ,wing nut ,expansion anchor bolt,implosion nut U-clip,hook and other special fastener most of them are used in building construction to  fix formwork.

Curved wedges are used with pins to tighten adjoing forms .Securing the tie and form in place.Curved wedges have the same function as straight wedges but the curved shape allows for easy insertion and less risk of damage to face of concrete form.

   Pls let me know if i can be of furthur assistance.

Wendy zhang

Shijiazhuang Hanpiao Metal Work Co.,Ltd.