Used as shown in the above photo and in the diagrams (select "View" in the price line below), they solve the ever-present problem of wood movement in furniture construction. Two sizes are available for use with round-head screws up to #10 or #14.
The washers readily install in skirts or frames; simply rout or drill the necessary slots in the members. The #10 is just shy of 1/2" wide with a 3/16" clearance slot, and the #14 just under 5/8" with a 1/4" clearance slot. They are an elegant and inexpensive solution to an age-old problem. Sold in packs of 12. Zinc-plated steel.
Made in USA.