{"product_id":"diamond-core-drill-bit-4-in-102mm-for-hard-stone-durable-cut","title":"Diamond Core Drill Bit 4 in 102mm for Hard Stone - Durable Cut","description":"\u003cp\u003eIn this review of the 4 in (102mm) diamond core drill bit, the bottom line is simple: it is aimed at tradespeople and serious DIYers who need a reliable hole saw for hard stone and masonry. The reviewer found the bit excels when used wet on an angle grinder with the correct adapter, delivering fast, clean holes in granite, engineered quartz and concrete. Functionality and cut quality stand out as the single biggest reasons to buy, although buyers should be aware that lifespan can vary with material and technique.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter and fit:\u003c\/strong\u003e The 102mm (4 in) diameter is sized for common sink and fixture holes and fits tools with a 5\/8 in-11 thread for direct spindle attachment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLaser welded segments:\u003c\/strong\u003e Laser welded diamond segments provide a rigid bond that helps keep the cutting edge stable during high-speed drilling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDry or wet use:\u003c\/strong\u003e The bit accepts both dry and wet drilling, and using water greatly prolongs the segment life when cutting dense stone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort overall length:\u003c\/strong\u003e The 100mm total length keeps the bit compact and easy to control on an angle grinder or with an adapter on a drill.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-material capability:\u003c\/strong\u003e Designed to cut hard granite, marble, engineered stone, concrete and brick, making it a versatile masonry accessory.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis diamond core bit suits professional tile setters, countertop installers and experienced DIYers who routinely cut holes in granite, marble and engineered quartz. It is particularly useful when a compact 4 in bore is required and when the user can supply an angle grinder or drill with the correct adapter.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for casual users who will only make an occasional hole without access to water cooling or the right adapters, since improper use can shorten segment life and increase the chance of damage.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFast, clean cutting through concrete and dense stone when used correctly with water.\u003c\/li\u003e\n\u003cli\u003eSolid build and laser welded segments give good cut quality and stable operation.\u003c\/li\u003e\n\u003cli\u003eCompact 100mm length and standard 5\/8 in-11 thread make it easy to mount to common grinders and adapters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDurability is mixed depending on material and technique; some users report the segment life can be short if used dry or on very abrasive surfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e102mm (4 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal length\u003c\/td\u003e\n\u003ctd\u003e100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread\u003c\/td\u003e\n\u003ctd\u003e5\/8 in-11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCutting method\u003c\/td\u003e\n\u003ctd\u003eDry or wet drilling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesigned for\u003c\/td\u003e\n\u003ctd\u003eGranite, marble, engineered stone, concrete, brick\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 4 in 102mm diamond core bit is a pragmatic choice for professionals and committed DIY users who need reliable hole-saw performance in hard stone and masonry. It offers excellent cut quality and mounting flexibility for angle grinders and drills, and represents good value when used wet and with the right adapter.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this bit dry?\u003c\/strong\u003e\u003cbr\u003eYes, it supports dry drilling, but using water will greatly prolong segment life and reduce dust and heat.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it fit my drill?\u003c\/strong\u003e\u003cbr\u003eThe bit has a 5\/8 in-11 thread and will fit grinders or drills with that spindle or a compatible adapter such as SDS, hex or round shank adapters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it suitable for engineered quartz?\u003c\/strong\u003e\u003cbr\u003eYes, customers report it works well on engineered quartz when used with correct feed rate and cooling.\u003c\/p\u003e","brand":"SHDIATOOL","offers":[{"title":"Default Title","offer_id":48643672572123,"sku":"B07K2XFD9F","price":86.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61dX_rYqN5L._AC_SL1100.jpg?v=1778654427","url":"https:\/\/gearmusthave.com\/products\/diamond-core-drill-bit-4-in-102mm-for-hard-stone-durable-cut","provider":"GearMustHave","version":"1.0","type":"link"}