Whiteside 5990 Shaker Straight Stile and Rail Router Bit Set for Plywood Panel 7/32" thick 1/2" Shank 2 Flute

This Shaker style rail & stile router bit set is set up to accept 7/32" or 5.5mm usually found with this style of construction. The reason for this is most 1/4" plywood used for door panels is imported and therefore not exactly 1/4" with 5.5mm being the standard. Measure your plywood before purchasing this set being there may be inconsistency is it's manufacturing.