Stainless steel materials have good extension strength and resistance in a of environments. The butterfly design of the screw increases the lateral bearing , making it easier to fix. An excellent alternative to industrial and construction fasteners. Fasteners for household and office appliances, communication equipment, ship assembly or other machinery industries. , portable, easy to carry and use. Jkjhbhged size:3.5x0.8cm Material:Stainless steel colour:Silver Package Contents: 2 x Screws 2 x Butterfly Bolts 4 x Washers 2 x Protective Caps Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.