Comparable domains sold:
xtechnology.com$1,250 (USD)
xcompliance.com$1,395 (USD)
xpanels.com$1,695 (USD)
xproducts.com Sold for $1,200 (USD)
xenterprises.com Sold for $1,500 (USD)
xcontrollers.com Sold for $1,800 (USD)

Great extension: Uses the .com extension.

Short: xcontractors is 15 characters or less.