
Beefed Up Heavy Duty Steel Corner Brackets Four Pack Three And A Half Inch 90 Degree Mantel Support Brackets One Quarter Inch Thick Black Powder Coated Anti Rust Wear Resistant 300 Lbs Per Bracket
Beefed Up Heavy Duty Steel Corner Brackets Four Pack Three And A Half Inch 90 Degree Mantel Support Brackets One Quarter Inch Thick Black Powder Coated Anti Rust Wear Resistant 300 Lbs Per Bracket
The Story
✔️ Holds 300 lbs per bracket, four-pack, 1/4 inch thick steel
These heavy duty steel corner brackets reinforce 90-degree joints for mantels, shelves, and frames. They’re common in home carpentry, furniture builds, and workshop projects to create rigid, durable corners.
✅ 300 lbs load per bracket with steel construction and black powder coat
✅ 3-1/2" (90 mm) size, 1/4" (6 mm) thick
✅ 8 holes Ø3/8" (10 mm) for 3/8" bolts
✅ 1.47 lb (0.66 kg) per bracket; 5.96 lb (2.7 kg) for four
✅ Anti-corrosion, wear resistant, anti-rust with smooth edges
✅ Black powder coated finish offers durability and low maintenance
💡 What is a heavy duty steel corner bracket used for in home projects? This handy hardware helps reinforce 90-degree corners in mantels, shelves, and frames.
- Heavy duty steel corner brackets reinforce corners in woodworking and metal framing - Handy for mantels, shelves, frames, and table supports - Powder coated black finish resists rust in high-use areas - 3-1/2" span with 8 holes sized for 3/8" bolts provide strong mounting
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
✔️ Holds 300 lbs per bracket, four-pack, 1/4 inch thick steel
These heavy duty steel corner brackets reinforce 90-degree joints for mantels, shelves, and frames. They’re common in home carpentry, furniture builds, and workshop projects to create rigid, durable corners.
✅ 300 lbs load per bracket with steel construction and black powder coat
✅ 3-1/2" (90 mm) size, 1/4" (6 mm) thick
✅ 8 holes Ø3/8" (10 mm) for 3/8" bolts
✅ 1.47 lb (0.66 kg) per bracket; 5.96 lb (2.7 kg) for four
✅ Anti-corrosion, wear resistant, anti-rust with smooth edges
✅ Black powder coated finish offers durability and low maintenance
💡 What is a heavy duty steel corner bracket used for in home projects? This handy hardware helps reinforce 90-degree corners in mantels, shelves, and frames.
- Heavy duty steel corner brackets reinforce corners in woodworking and metal framing - Handy for mantels, shelves, frames, and table supports - Powder coated black finish resists rust in high-use areas - 3-1/2" span with 8 holes sized for 3/8" bolts provide strong mounting






















