1.slic pin :DIN,SAE standand 2.ccc.ISO,TS certificate ... as following1.easy ,fast to assembly2.pin and cotter are in one3.the slic pin eliminates cotters , nuts and bolts and ... easy insertion ramp . Vertical face at rear prevents backing out.this material can according to your require, low carbon steel ... steelsurface treatment can also meet your requirements slic pin , quick release pin , lock pin