FREE SHIP United States The arbor of the core bit, milling bit and chamfer bit is 5/8″-11 Female Thread. This package carries (a)-(e).(a) is optional. You can choose V10, V13, V20, V25, V30, V40, V50, V60, V70 router bit.V10 is for 10mm (3/8″) thick or Hogh stone concrete travertine to do Full shape bullnose. V10 is for 3/8″ (10mm) Thick. V13 is for 1/2″ (13mm) Thick. V20 is for 3/4″ (20mm) Thick. V25 is for 1″ (25mm) Thick. V30 is for 1-1/4″ (30mm) Thick. V40 is for 1-1/2″ (40mm) Thick, V50 IS FOR 2″ (50MM) Thick, V60 is for 2-3/8″ (60mm) Thick, V70 is for 2-3/4″ (70mm) Thick.Please confirm your tile or countertop edge thickness before you buy. (b) 1 Piece of 3/8″ Hex shank (with 5/8″-11 Thread spindle) adapter. (c) 1 Piece of (0mm) to 2″ (50mm Diameter) Trimming Chamfer Bit. With 5/8″-11 Female Thread arbor. For stone granite marble concrete travertine ceramic porcelain.This Diamond Cone Countersink Drill Bit is equivalent to several different sizes of core bits. Starting with the 1” diamond core drill bit to begin a hole, this chamfer bit can enlarge the hole into any size up to 2 inches (50mm) (d) 1 Piece of 1″ (25mm Diameter) Diamond core drill bit for stone concrete granite marble ceramic porcelain hole cut. (e) 1 Piece of 1″ (25mm Diameter) Diamond Zero Tolerance Grinding drum / Milling Bit for stone concrete granite marble ceramic porcelain hole inner edge polishing, enlarging, shaping.