Tile Hole Saw Kit 13pcs - Diamond Core Drill Bits 6/6/8/19/25/35/50/75/102/125mm for Tile Porcelain Marble Granite with 20mm Diamond Finger Bit and 2" Chamfer Bit Trimming Hole and SDS Adapter

Durability--Vacuum Brazed technology combines a high-quality steel matrix with diamonds in a scientific ratio and provides high efficient working performance and longer service life.
Fast drilling--Lightning teeth has wide chip removal slots, dust can be quickly discharged when drilling, not easy to be clogged.



Why do tiles crack when drilling? The tiles were not placed perfectly horizontal or the drill bit was not tightened with a wrench causing the drill hole to wobble and the tiles to be unevenly stressed. If you use it on a hand drill, using hammer mode also cause it.
Why does a small size brazing bit like 1/4 inch wobble a lot? The drill bit was not tightened. Because the drill bit is filled with wax, you need to use a wrench not your hand to tighten it. The concentricity of the substrate was not allowed during the production process, requiring an aftereplacement.
What are the considerations if I use this 5/8 threaded bit in a hand drill? Don't use the hammer or impact mode. Absolutely not. Both the drill bit and the material you drilled will be damaged.
What do I need to keep in mind when choosing a machine? Angle grinders are best. If using a hand drill, try to use one with a high RPM. Generally corded hand drills are superior to lithium battery hand drills. Because plugged in rigs generally have a higher RPM than lithium battery rigs.
What specific types of stone are these drill bits used for? Mainly for soft stones like tile marble granite. Use wet on hard concrete. Not for wood or metal like reinforced concrete and steel pipes. For glass, it is recommended to buy a drill bit that is specifically designed to drill glass instead of this.

Diamond Tile Hole Saw Kit Pack of 13 Contains 10pcs diamond core drill bits; 1pc 4/5 inch diamond finger bit; 1pc 2 inch diamond chamfer bit; 1pc connect 5/8"-11 thread to SDS-plus adapter.
Fully functional for drilling, reaming, grinding, and chamfering; with adapters to fit more machines.

Enlarge/trim/repair holes ( Diamond Finger/Milling Bit as examples) Make curved rounded cornersWork
EffectEnlarge holesNote: The kit containsdiamond milling bit 20mm, and the picture shows the 10mm milling bit for functional demonstration.
Work Effect
Enlarge/trim/repair holes ( Diamond Beveling Chamfer Bit as a example) Chamfering/Beveling Work Effect Enlarge holes Work Effect
Contain core drill bit adapter to fit more machine With sds-plus adapterFor hand drill or other standard drill machine with sds-plus shank.
Do not use impact or hammer mode.

Good work effectMake sure the speed is higher than 2000 RPM. Typical hand drills are 2000-5000 RPM. Within this range, the faster the drill speed, the longer it will last. So we don't recommend for a cordless drill. The lithium drill has a lower RPM, about 1000 RPM.