JIG-A-DECK Deck Spacer & Fastener Alignment Guide for Hardwood, Composite, PVC and Pressure Treated Decking (2 PACK) Helps create a straight line of screws across your whole deck JIG-A-DECK allows you to professionally space & fasten deck boards in a fraction of the time Allows perfect fastener spacing for both 4" & 6" wide deck boards Helps provide perfect 1/4" spacing Excellent for use with hardwood, composite PVC & pressure treated decking