CMT 818.128.11 Dovetail Bit 1/2" A=14 degrees S=1/4" CPTZ Concealed Post Bases Why does this post base

Why does this post base have a 1 in

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CMT 818.128.11 Dovetail Bit 1/2" A=14 degrees S=1/4" CPTZ Concealed Post Bases Why does this post baseThe CMT 818. 128. 11 is a Dovetail Bit. Dovetail bits cut the characteristic trapezoidal profile for dovetail joinery. Used for hand cut dovetail routing with dovetail jigs. Angle: 14 degrees. SPECIFICATIONS Product Type Dovetail Bit Angle 14 degrees Shank 1 4" Blade Material Carbide Tipped (TCT) Rotation Right hand (RH) Country of Origin Made in Italy COMPATIBLE MACHINES Handheld Router Router Table CNC Routing Machine APPLICATIONS Dovetail Joints