Amana Tool RCK-236 Pair of Groove Insert Carbide Knives for Adjustable Tongue & Groove no. 61218

Adjustable Tongue & Groove Insert Cutter set includes unique adjustment system & a gauge for precise settings.

• Designed to cut precise grooves to provide undersized plywood veneered
  panels with a snug rattle-free fit
• For 5.5mm undersized 1/4" plywood, and 5.9mm oversized 1/4" veneered plywood
• Adjust the panel groove width from 3/16" to 5/16"
• Cut frame stock from 5/8" through 1-3/16" in thickness