Material: The sets are all made of 304 stainless steel 18/8; Excellent toughness; Good rust and corrosion resistance in both indoor and outdoor use; Extra Black Oxide treatments make it more chemical resistance while not impact strength or hardness
Carriage Dia: 0.84 inch (max); Square Neck Height: 0.21 inch (max); Please note that the screw length 1.25 inch includes the square neck part
Feature: (1) Can be easily tightened; (2) Withstand heavy vibrations and impacts for machinery usage; (3) Resist loosening over time; (4) Black Coating will not easily wear off over time; (5) Widely used in home improvement and industry applications due to their versatility and strength, their sturdy design ensure a secure connection