Click to expand Tap to zoom Amana 1/4" Extension Adapter 15 reviews DescriptionDescription Diameter (D): 3/4" Shank (d): 1/2" Overall Length (L): 3-7/16" Max RPM: 18,000 L1: 1-1/4" L2: 1-15/32" L3: 5/16" D1: 1/4" CNC Extender Adapter made especially for 1/4" shank router bits. Total Indicated Run-out (TIR) is 0.00118" (0.03mm) Max RPM =18,000 Original price $58.95 - Original price $58.95 Original price $58.95 $58.95 - $58.95 Current price $58.95 | / 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart