CMT 550-111X Multi-Purpose TCT Hole Saw 4-3/8" (111mm) APB Adjustable Post Base 4-Sided Insert Knife Knives are

4-Sided Insert Knife Knives are profiled on 4 sides - rotate to a new edge as each dulls

It creates a strong structural connection where one member intersects another at 90 deg

Rated for softwood

and plastics - making it a go-to solution for metalworking professionals who demand clean finishes without rework

The HDU holdown is pre-deflected during the manufacturing process

CMT 550-111X Multi-Purpose TCT Hole Saw 4-3/8" (111mm) APB Adjustable Post Base 4-Sided Insert Knife Knives areThe CMT 550 111X is a 4 3 8" (111mm) Multi Purpose TCT Hole Saw (Series 550X) with XTREME FAST Push&Lock system. The carbide tipped construction cuts wood, plywood, MDF, laminates, plasterboard, plastics, bricks, aerated concrete, and soft tiles 5X faster than standard hole saws. Compatible with all CMT 550 551 arbors via the Push&Lock quick change system. SPECIFICATIONS Diameter 4 3 8" (111mm) Cutting Depth 5 inches Blade Material Carbide Tipped