CMT 812.620.11 Straight Bit Long Series 12mm S=1/2" Chucks & Collets 160 is a 16 diameter

160 is a 16 diameter 4 Flute Dowel Drill (Long Series (70mm))

while the knife plate is made from heavier 10 ga

Diameter (D) 3-1/8"

The CMT 551-025X is a 1" (25mm) Bi-Metal Plus Hole Saw (Series 551X) with XTREME FAST Push&Lock system

051 is a 5

CMT 812.620.11 Straight Bit Long Series 12mm S=1/2" Chucks & Collets 160 is a 16 diameterThe CMT 812. 620. 11 is a Straight Bit Long Series. Long series straight bits for deeper cuts. CMT Industrial Chrome Carbide with SinterHIP processing for superior wear resistance. SPECIFICATIONS Diameter (D) 12mm Cutting Height (I) 1 1 4" Total Length (L) 2 3 4" Shank (S) 1 2" Number of Teeth 2 Product Type Straight Bit Long Series Shank 1 2" Blade Material Carbide Tipped (TCT) Rotation Right hand (RH) Country of Origin Made in Italy COMPATIBLE