New projects and repairs Massca twin pocket hole jig is designed to allow the accurate drilling of side by side pocket holes on both new projects and repairs. Its unique magnetic quick adjust system makes setting up the jig a rapid and simple operation, without doubt one of the simplest and most efficient pocket hole jig systems available today. Read more Work with different wood sizes Pocket hole jigs are for use with timber from 1/2" - 1.1/2" in Thickness (13mm - 38mm). Read more Make easy your carpentry projects. Whit Massca Twin Hole Jig pocket you will work fast with the unique magnetic quick set up system.