This multi step diamond hole opener is specially engineered for hole expansion on marble, quartz stone, artificial stone, microcrystalline stone, ceramic tile and large-format sintered slabs. Its unique triple-step integrated structure provides three different bore sizes on one tool, which allows you to complete primary drilling and secondary hole enlarging simultaneously without switching drill bits frequently. Made with vacuum brazed diamond grit, it delivers smooth, chip-free round holes with high efficiency for stone fabrication and renovation work.
Specifications
Type: 3-in-1 multi-layer step hole opener
Sizes: 20-35-50mm，20mm, 38mm, 48mm, 50mm
Thread : M10, M14, 5/8"-11 universal threads for global angle grinders
Craft: Vacuum brazed diamond abrasive layer
Applicable Materials
Marble, quartz stone, artificial stone, microcrystalline stone, ceramic tile, sintered stone slab, porcelain countertop
Application Scenarios
Sink & faucet hole drilling for kitchen & bathroom stone countertops
Pipe hole expansion & chamfering for wall and floor ceramic slabs
Custom hole machining for stone vanity tops and decorative crafts
Whole-house renovation tiling and stone pipeline cutout projects
Core Advantages
All-in-one triple-step design: three diameters on one bit, realize drilling and hole enlarging at once to cut tool change downtime
Wide material compatibility: perfectly works on marble, quartz, microcrystalline stone, ceramic and sintered stone
Firm vacuum brazed diamond grit resists shedding, extending service life.
Low-vibration stepped body reduces slab chipping and delivers smooth hole walls.
Multiple universal thread options fit most mainstream angle grinders worldwide.
Usage Notes
Choose matching M10/M14/5/8"-11 thread and fasten the drill bit tightly before operation.
Operate with continuous water supply for wet drilling to cool abrasives and reduce wear.
Feed evenly with mild pressure; avoid forced pushing to prevent grit loss or slab cracking.
Wear safety goggles, dust mask and gloves, keep passers-by away from flying debris.
Take periodic cooling breaks during long continuous drilling.
Inspect diamond coating for defects before each use and store in dry places.
Reasons to Choose Our Products
Unique 3-size integrated design greatly improves working efficiency and reduces tool inventory cost.
Full compatible with all mainstream decorative stone materials for one-stop procurement.
Rigorous factory quality control guarantees stable cutting performance in bulk orders.
Factory direct supply accepts OEM logo and customized packaging for wholesalers & distributors.
Stable stock and reliable after-sales support to avoid project delays.