Easy to Use: the hexagonal head is designed to firm adsorption, and the tip of the screw is designed to be sharp, no pre-drilling is required for operation. Perfect for use with wood, normal thickness metal, brick or other hard materials. If the electric drill is used for thicker metal layers, please keep a constant and uniform pressure. Excellent Material: the whole is made of stainless steel, which is one of the highest forms of corrosion-resistant steel, not easy to rust, and stronger and more durable than ordinary materials. Exquisite workmanship, smooth thread surface, complete and sharp, uniform force, not easy to or deform. Wide Range of Applications: This product can be used , industry or office. Such as fixing wooden furniture or connecting plate structures, electronic products, household appliances, fixing parts, mechanical maintenance, etc. Save time by reducing several steps in the installation process. Rich Combination: This link contains 150 self-tapping screws, 10 x 3/4 inch and 10x 1 inch are 50 pieces respectively, 10x1-1/2 inch and 10x2 inch are 25 pieces respectively. 4 lengths for close matching to meet your . Product Dimensions: About Effective Length 10 x 3/4 inch is 19mm, 10x 1 inch is 25mm, 10x1-1/2 inch is 38mm, 10x2 inch is 50mm. the detailed dimensions are shown in the picture. the detailed dimensions are shown in the picture. Material: Stainless steel colour: silver Package Contents: 1 set x screws assortment Only the above package content, other products are not included. Note: Light reflection 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.