Self-tapping screws for sandwiches, and frame housing construction

Structural screw, or self-tapping screws for frame, lumber, log housing construction. The price is half the market price, call us to agree, they still lie idle. In the photo there are samples, the quantity is different, only yellow ones remain, dimensions are 220mm x 1000 pieces, at 230 tenge, per piece, the price is 2 times lower than the market