These bench dogs fit into a 20mm hole of e.g. Festool MFT and others. If you're looking to make your own workbenc check out this ingenious designed helper for accurate holes: http://www.thingiverse.com/thing:2079995
This thing is surprisingly sturdy even when printed in PLA. Plus: a plastic bench dog will not damage your saw blade!
10% off on Laser and other Electronic Items. Use code "Elec" at checkout! http://goo.gl/iuHgLF
For added strength be sure to print not just more Infill bot more Perimeters!