[Package includes] Sufficient quantity and nice combination meet your different demand and replacement, easy to install and fix [Outlet Screw Spacers] the outer diameter of these round spacer is 10 mm, and the inner diameter is 4 mm, come with 7 diverse lengths, including 5 mm/ 10 mm/ 15 mm/ 25 mm/ 35 mm/ 45 mm/64mm;: the outer diameter of these round spacer is 10 mm, and the inner diameter is 4 mm, come with 7 diverse lengths, including 5 mm/ 10 mm/ 15 mm/ 25 mm/ 35 mm/ 45 mm/64mm; [Wall plate screws] feature with 6 different lengths, such as 1-3/4, 1-1/2, 3/4, 1, 1/2, 1/4 inch, 15 pieces for each size, proper for most sized recess; The outlet screws can be slid through the outlet tools easily and also can conveniently be adjusted to the depth you want [ANY MATERIAL]The electric outlet extenders work with almost any material; If you're installing electrical outlet spacers for , wood, marble, tile, backsplash or even drywall, these are the outlet box extenders you need for a every time [Wide applications] recess head makes our device mounting screws become more suitable for fixed sockets, sockets, elbows, switches and dimmers, and apart from that, the long screws fit for embedded electrical boxes, residential or commercial electrical fasteners very well Color: As Shown Material: Silicone+Metal Package Contents: 105 * socket screw washer 90 * round head bolt 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.