There are a several bricklaying accessories and aids used in conjunction with a brick line. Below is a guide to some of the most commonly used.
Line pinsare simple metal pins or spikes that can be pushed into the earth or between bricks and a line held tautly between them.
Line blocksare specially shaped blocks, typically made from plastic, though there are metal and wooden varieties.
Many brick lines can be purchased on a spool or reel. A pin spool has a rotating spool for ease of use when letting out the line. It also has the advantage of having a spike or “pin” that allows you to push it into soft earth when laying out. The pin doubles as a handle when letting out the line.
A line level is essentially a small spirit level that can be hooked onto a string line to see if it is horizontally flat (level) or not.