Constant Torques Hinge: Four pre-drilled countersunk holes allow easy integration and installation without adjustment Black Zinc Alloy Replacement Constant Torques Hinge: Made of alloy for long service life, corrosion resistance, and good toughness 4 Holes Constant Replacement Hinge For Position Control: Can be maintained at any position without slippage, easy to replace the Soutch E6-10-216 Easy to Integrate and Easy to Install: This constant hinge is designed for seamless integration and effortless installation New Materials with Excellent Precision Machining : Crafted with new alloy materials, this hinge offers excellent precision machining for reliable performance, Weight: 0.2 pounds, Manufacturer: KIXZSAZ