Heavy-Duty Stainless Steel Eyebolts: These shoulder eye bolts measure 5/16" thick x 4-3/16" long (M8x105mm) with a 6.8mm shaft diameter, capable of supporting 375lbs/170kg - includes 4pcs per set for maximum security in concrete/masonry applications.
Professional-Grade Concrete Installation: Designed for permanent anchoring, the expansion bolts require a 12mm drill bit and a drilling depth of at least 5mm deeper than the bolt length. They expand through a tapered mechanism when tightened, creating an ultra-secure hold.
All-Weather 304 Stainless Construction: Made of corrosion-resistant 304 stainless steel with a polished finish, these expansion lifting ring bolts withstand humid environments, saltwater exposure, and extreme temperatures for indoor/outdoor durability.
Multi-Purpose Structural Anchors: Heavy duty eyebolts are ideal for sun shade sails, hammocks, AC units, burglarproof doors, canopies, and engineering projects - not recommended for vibrating loads like ceiling fans, but perfect for heavy-duty hanging applications.
Secure Weld-Ready Design: Featuring widened weld plates and reinforced shoulders, the shoulder eyebolt screw provide stable mounting points for chains, ropes, or cables in concrete, brick, or wood surfaces - complete for DIY or professional use.