Works with Trend’s Ceramic Coated Deck Screws to install decking without visible fasteners. Features built-in spacers to ensure accurate board spacing, built-in clamp with adjustment for varied board widths and hardened screw guides. Features 50° Hardened Screw Guides create a concealed deck fixing to prolonging decking life and improve appearance. Built-In Board Spacers create a consistent and accurate 3.5mm, 4.5mm or 5.5mm gap between boards for drainage and expansion. 90-150mm Board Width Adjustment to suit a large range of standard and non-standard boards. Quick-Release Clamping Arm secures the jig to the decking board for easier, accurate installation. On-Board Tool Storage for storing the driver bit. Includes hex shank Roberson no.1 bit driver. Standard Equipment 1x Trend DK/JIG Concealed Decking Jig