Diamond Drill Bits 10pcs 6-12mm Core Bit+Cross Hole Opener Ceramic Quick-fit Shank

Item: BGTEC Diamond Drill Bits Set Cross Hole Opener for Ceramic Tile Glass PVC Brick Wood Drilling Core Kit Quantity: 10pcs/box Connection: Quick-fit Shank,shank diameter 6.35mm Package: Plastic Box Specification and Application ·Diamond Drill Bits 1) Segment material:Diamond coated 2) Specification: Diamond core bit:Diameter 6/8/10/12/14mm,Segment height 10mm,Total length 66mm,Grit#50/60 3) Application: Dry or wet drilling Porcelain tile,Ceramic tile,Marble,Granite,Brick,Stone... Cross Hole Opener 1) Segment material:Hard alloy 2) Specification: Diameter 6mm,Segment height 12mm,Total length 77mm; Diameter 8mm,Segment height 14mm,Total length 79mm; Diameter 10mm,Segment height 14.5mm,Total length 82.5mm; 3) Application:Dry use:wood,PVC,brick,aluminum alloy,plastic,steel; Wet use:ceramic tile,porcelain tile,glass,marble... 4) Note:This cross hole opener is to provide accurate positioning for diamond bit, not for drilling! Feature:  1.Use the cross hole opener first to position the