Feature: This screw is made of carbon steel material, good quality, high hardness, adopting nickle plated technology to form a layer of dense and stable oxide film, suitable for all kinds of environment, durable and long lasting. Standard slotted head design, more convenient to binding or remove. Round smooth rivet, hard and thick, all match color, can be applied to all kinds of leather craft. Specification: Size: 4x6mm, screw diameter 4mm (5/32"), screw length 6mm (1/4"), head diameter 10mm (3/8"),another head diameter 9mm (11/32")Applications: Suitable for all kinds of leather craft, such as belt, handbag, shoes, clothes, leather bracelet, you can use it as long as you want. Usage: Standard slotted head design, arc surface, deeper groove, more convenient to binding or remove, can be used repeatedly. Color: Round smooth rivet, hard and thick, match all color, wherever it is used will be a beautiful scenery. Material: Made of carbon steel material, good quality, high hardness, adopting nickle plated technology to form a layer of dense and stable oxide film, suitable for all kinds of environment, durable and long lasting. Package: 15 sets Black Chicago Screws, Size: 4x6mm, screw diameter 4mm (5/32"), screw length 6mm (1/4"), head diameter 10mm (3/8"),another head diameter 9mm (11/32").Date First Available: October 18, 2017. Manufacturer: LQ Industrial. Item Weight: 0.634 ounces. Is Discontinued By Manufacturer: No. Best Sellers Rank: #13,189 in Arts, Crafts & Sewing. Customer Reviews: 4.3 4.3 out of 5 stars 605 ratings 4.3 out of 5 stars. : B076J9MMZJ. Item model number: 4336863810. Package Dimensions: 2.36 x 1.97 x 0.43 inches. Fastener Type: Machine Screw. Thread Coverage: Fully Threaded. Head Type: Round. Color: Black. Brand: LQ Industrial. Metal Type: Carbon Steel. Thread Size: 1/4. Exterior Finish: Steel. Head Style: Round. Drive System: Slotted. Material: Iron.