The package comes with 100pcs of silver carbon steel in nut size 1/4inch x 5/8inch, thread size: 5.5 x 19mm/0.22 x 0.75inch(D*L), casing length: 5.1mm/0.2inch, total length: 24.5mm /0.96inch, nut size: 9.7 x 4.4mm/0.38 x 0.17inch(Across Flats D*T), pre-drilled hole diameter: 10.5mm/0.41inch, installation torque: 5Ft/Lbs. Made of carbon steel, treated with an electroplating process for enhanced corrosion resistance, high hardness, and long-term durability. Designed with threaded bolts, the screw head is evenly stressed and has reliable thread connection and fixing capabilities. It can be firmly fixed to concrete, block, brick and stone, walls, or any solid surface. The bolt is suitable for various situations such as construction, home decoration, and mechanical equipment, widely used in guardrails, anti-theft doors, awnings, air conditioning propeller fixing, home decoration, engineering, etc. Drill holes in the wall, use hex nut sleeve anchors, insert the anchors into the pre-drilled holes, secure the nuts and install the bolts to complete the connection. Colour:Silver Material:Carbon Steel quantity:30Pack Package Contents: 1 set x wedge anchors 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.