【Certified Stainless Steel】Black lag bolts are made from 18-8 (304) stainless steel and coated with black oxide, which is certified, good look, strength and corrosion resistant.These bolts well made and you will keep them for future needs. 【Various Sizes】Lag screws kit includes 5 different most common used sizes: Diameter are all 1/4"; Length from 1'' to 3''. Thread Type are all Coarse (standard); Quantity: 155 pieces screws and washers. Refer to Figure 2. 【Project Center】These wood screws assortment kit are excellent for exterior household and industrial applications such as deck buildings, gazebos, trusses and other wood connections.We used these as the fasteners for steel banding trim on a custom barbwe designed and built.Turned out perfectly! 【Choice for Heavy Duty Applications】These lag bolts are ideal used for securing wood in heavy duty applications that standard wood screws cannot support the load feature deep wood screw coarse threads for superior holding and prevent stripping in the material; Can be applied in even severe environment. Often using with washer which distribute the pressure of the head evenly so that to prevent pull through. 【Guarantee in JROUTH】Our hex lag screws undergo rigorous inspections to ensure they are 304 stainless steel and the right size you want; JROUTH is a professional fasteners seller brand. We will do our best to provide you a pleasure shopping experience. 1/4 Hex Lag Bolts 1" 1-1/2" 2" 2-1/2" 3", JROUTH 155PCS Black Oxidized, Hex Lag Screws Heavy Duty Wood Screws Washers Assortment kit Stainless Steel 18-8 (304)