Composition: Spring type straight pins slotted - heavy type acc. to ISO 8752 Steel Contents: 4x30 -x40 -x50 -x60 / 5x20 -x26 -x30 -x40 -x50 -x60 / 6x40 -x50 -x60 -x70 / 8x40 -x50 -x60 -x70 520 pieces