Specification Brand : FIYA BulletPoint1 : Product Name: Expansion Hook Bolt; Material: 304 Stainless Steel (Product Name: Expansion Hook Bolt; Material: 304 Stainless Steel BulletPoint2 : Weight: 968g; Package Content: 10pcs x Expansion Hook Bolt (Weight: 968g; Package Content: 10pcs x Expansion Hook Bolt BulletPoint3 : Punch Diameter: 12mm/0.47"; Main Color: Silver Tone (Punch Diameter: 12mm/0.47"; Main Color: Silver Tone BulletPoint4 : Overall Size: (Length)100mm/4"; Thread Size: M8 x 80mm/0.31" x 3.1" (D*Bolt Length) (Overall Size: (Length)100mm/4"; Thread Size: M8 x 80mm/0.31" x 3.1" (D*Bolt Length) BulletPoint5 : Eyelet Diameter: 34 x 19mm/1.3" x 0.75" (Outer Dia.*Inner Dia.) (Eyelet Diameter: 34 x 19mm/1.3" x 0.75" (Outer Dia.*Inner Dia.) Color : Multiple colors ExteriorFinish : Stainless Steel ItemName : IIVVERR M8x80mm Expansion Screws Closed Hook Anchor Bolts 10pcs for Wall Concrete Brick (M8x80mm Expansion Screws Closed Hook Anchor Bolts 10pcs for Wall Concrete Brick ItemTypeKeyword : hook-anchors Manufacturer : IIVVERR ManufacturerGrade : Grade 304 Material : Other PartNumber : efd950c044f4f56 ProductDescription : M8x80mm Expansion Screws Closed Hook Anchor Bolts 10pcs for Wall Concrete Brick M8 male thread Expansion screw hook anchor bolt with flat washer and hex nut. Closed hook bolts suitable for secure and reliable fixing of items and fixtures to concrete, brick, walls and any solid surface. Installation methods: Select a chopping bit with the same diameter as expansion screw casing, and install it on the electric drill for punching. The depth of the hole should be equal to the length of the bolt. Then insert the expansion bolt set into the hole. Remember: Do not screw off the nut and prevent the bolt from falling into the hole when the drill is too deep. Tighten the nut for 2 to 3 buckles and unscrew the nut when expansion bolt si very tight without any looseness. Then the fixed items are mounted with perforated fixed part and installed aiming at bolt. The gasket or spring washer outside is used to screw the nut tightly. Description in French M8x80mm Expansion Screws Closed Hook Anchor Bolts 10pcs for Wall Concrete Brick Product Name: Expansion Hook Bolt; Material: 304 Stainless Steel Weight: 968g; Package Content: 10pcs x Expansion Hook Bolt Punch Diameter: 12mm/0.47"; Main Color: Silver Tone Overall Size: (Length)100mm/4"; Thread Size: M8 x 80mm/0.31" x 3.1" (D*Bolt Length) Eyelet Diameter: 34 x 19mm/1.3" x 0.75" (Outer Dia.*Inner Dia.)