General description Timco Light Duty Nylon Hammer Fixings are designed for securing timber to various masonry substrates, including concrete, brick, and block. These fixings come in a convenient box of 200 pieces. Technical specifications Plug Size: 6 x 40mm Screw Sizes: 3.5 x 40mm, 5 x 30mm, 5 x 50mm, 6 x 40mm, 6 x 50mm, 6 x 60mm, 6 x 70mm, 6 x 80mm Material: Carbon Steel with Zinc finish Usage Ideal for use in clean and dry environments Countersunk head provides a flush finish Strong collar supports the drive nail