Feature: 1. Made of high quality zinc alloy, durable and rustproof. 2. Unique external thread makes it insert hole easily and save effort. 3. External thread ensures strong resistance against pull out. 4. Flanged head prevents splitting of the surfaces and driving the insert too deeply. 5. Provide a strong permanent thread for wood and wood based sheet materials. Specification: Features: Made of high quality zinc alloy, durable and rustproof. Unique external thread makes it insert hole easily and save effort. External thread ensures strong resistance against pull out. Flanged head prevents splitting of the surfaces and driving the inserttoo deeply. Provide a strong permanent thread for wood and wood based sheetmaterials. Specifications: Model: M5 Quantity: 50pcs Color: As pictures show Material: Zinc Alloy Length: 1cm/0.39in Hex Width: 0.5cm/0.20in Weight: Approx. 43g Package included: 50 x Hex Drive Head Nut