For aluminium form system 1 the material is 45# steel 2 length 100mm thickness 3 mm 3 concrete formwork tie pin

Tie pin 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. 

1 the material is 45# steel

2 length 100mm thickness 3 mm

3 concrete formwork Long wedge bolt

4 aluminum form wedge

 

Korean Tie pin