On Off Magnetic Block for Burning Guides, Two Blocks, Fits up to 1 8 in Thick Standard Square or Straight Edge no checkout quick release pins for fast quick release pins for fast assembly and disassembly Made of spring steel to maintain tension Handy kit for shop toolroom or toolbox LED lights that can be adjusted to needed angle for inspection in tight dark areas Heavy Duty grip will not slip in wet or oily hands up to 1 8 inch thick to form your own burning guides Blocks are machined from aluminum and have grooves on three sides Included are set screws to easily adjust blocks on straight edges or squares Options available for one On Off magnetic block (MSB201) or two On Off magnetic blocks (MSB202)