BIG FOR SMALL SPACES - support bracket is perfect for where limitations and/or flexibility in space are critical, such as kitchen, laundry room, retail/grocery stores, RV, boat, warehouses, industrial, garages, maintenance storage, office/residential storage). Apply them to table legs or surface for folding legs of DIY table or bed, folding workbench project, fold down desk extension etc. EASILY FOLD AND SELF-LOCK -For added security, these brackets feature spring-activated "positive lock" that assures stability by locking in the open position(*Please notice that it ' lock in close position). When the table or working surface are not in use, just press the latch and fold down for more rooms. LOADING RATE -225kg(500lbs.)/pair. These load limits are intended to be used as general guidelines only, and no -expressed or implied. These brackets works better when applied on furniture legs or narrow and simple working surfaces. spacing without supporting of legs will result in reduced load capacity. Actual use conditions will typically result in lower load capacity than laboratory conditions. PHYSICAL PARAMETERS - Dimension: see pictures. Material: iron. Color: black. Weight: 0.2kg(0.4lbs)/pair. Max Load: . 225kg(500lbs.)/pair. When you enter a home, an office, or even a garage where organization reigns, you simply feel better. support bracket is perfect for where limitations and/or flexibility in space are critical, apply it on DIY homemade table, folding partition frame, folding door, or anywhere that requires to be folded when not in use. The spring-activated lock assures stability by locking in the open positions. Folds easily when not in use. To unlock, simply push the latch and fold down. Attention Environmental Considerations: Environment: Excessive humidity, salts, or other agents can corrode the finish and attack metal or plastic components. Fastening: Inadequate or incorrect fasteners can result in the brackets pulling loose and causing damage. Alignment: Improper bracket alignment can result in an installation that is ineffective and unsafe. Package Include: 4* Foldable support frame Only the above package content, other products are not included. Note: Light 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.