{"product_id":"bullseyebore-core-cg1-100-drill-guide-for-straight-holes-magnetic","title":"BullseyeBore Core CG1-100 Drill Guide for Straight Holes - Magnetic","description":"\u003cp\u003eIn this review the BullseyeBore Core CG1-100 stands out as a practical solution for anyone who needs consistently perpendicular holes. It is aimed at DIYers, remodelers and tradespeople who want to remove guesswork from drilling; the single biggest reason to buy is its visual alignment system that projects concentric green laser patterns so you can see when the drill is perfectly square to the work surface. The reviewer found the magnetic quick-attach and non-contact operation especially helpful for keeping the worksurface unmarred while maintaining full visibility of the drill bit.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCircular laser pattern:\u003c\/strong\u003e The dual-pattern system projects a fixed Reference Pattern and a variable Alignment Pattern so users can align until the rings are concentric, guaranteeing a square hole.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-visibility green laser:\u003c\/strong\u003e The 520nm Class 1, 1mW green lasers increase visibility in bright indoor conditions and indirect sunlight for easier alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic quick-attach:\u003c\/strong\u003e The Core connects magnetically to common drill chucks in seconds, allowing fast attachment and removal without tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks in any orientation:\u003c\/strong\u003e Because it uses projected patterns rather than gravity-dependent levels, it aligns holes on walls, floors, ceilings or angled boards equally well.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-contact operation:\u003c\/strong\u003e The guide never touches the work surface so there are no scratches or marring and the operator keeps a clear view of the bit and hole location.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety-engineered breakaway:\u003c\/strong\u003e If the unit contacts an object the magnetic connection breaks to stop rotation of the guide while the bit continues, reducing risk to the tool and workpiece.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Core is best for homeowners, woodworkers and tradespeople who regularly need straight holes and want a simple, visual method to check squareness without complex setups or jigs. It is ideal where visibility matters, such as finished surfaces or bright interiors, and for users who switch quickly between guided and unguided drilling.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users of rotary hammer drills (the Core is not compatible) and anyone who needs an integrated mechanical guide that physically contacts the workpiece rather than a non-contact visual alignment tool.\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\u003ePrecise visual alignment removes the guesswork and makes consistently perpendicular holes easier to achieve.\u003c\/li\u003e\n\u003cli\u003eStrong magnetic attachment and sturdy build make it feel durable and reliable in everyday use.\u003c\/li\u003e\n\u003cli\u003eNon-contact design preserves delicate or finished surfaces while keeping the drill bit fully visible.\u003c\/li\u003e\n\u003cli\u003eWorks at any angle, so operators can drill on walls, ceilings and floors without relying on gravity-based leveling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome users may find alignment requires practice to interpret the concentric patterns quickly and consistently.\u003c\/li\u003e\n\u003cli\u003eNot compatible with rotary hammer drills, so it is limited to common commercial drills only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eCG1-100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLaser\u003c\/td\u003e\n\u003ctd\u003eGreen 520nm, Class 1, 1mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported bit size\u003c\/td\u003e\n\u003ctd\u003e2 in to 5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttachment\u003c\/td\u003e\n\u003ctd\u003eMagnetic quick-attach to drill chuck face\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperation\u003c\/td\u003e\n\u003ctd\u003eNon-contact visual alignment; works in any orientation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eCommon commercial drills (not rotary hammer drills)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe BullseyeBore Core CG1-100 is a smart, practical accessory for anyone who needs to drill straight holes without bulky jigs. Its clear dual green laser patterns, magnetic quick-attach and non-contact operation make it good value for woodworkers and DIYers who value surface protection and visibility. While it takes a little practice to read the patterns quickly, it reliably removes guesswork and speeds up accurate drilling across a range of orientations.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this attach to my drill?\u003c\/strong\u003e\u003cbr\u003eIt attaches magnetically to the face of thousands of common commercial drills; it is not compatible with rotary hammer drills.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the alignment work?\u003c\/strong\u003e\u003cbr\u003eThe Core projects a fixed Reference Pattern and a variable Alignment Pattern; when the rings are concentric the drill is perpendicular to the worksurface.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it mark or scratch finished surfaces?\u003c\/strong\u003e\u003cbr\u003eNo, the device operates without touching the workpiece so it avoids scratches and preserves finished surfaces.\u003c\/p\u003e","brand":"BULLSEYE BORE","offers":[{"title":"Default Title","offer_id":48612402594011,"sku":"B0DZ9MN62X","price":69.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81yJRJqT6iL._AC_SL1500.jpg?v=1778531904","url":"https:\/\/gearmusthave.com\/products\/bullseyebore-core-cg1-100-drill-guide-for-straight-holes-magnetic","provider":"GearMustHave","version":"1.0","type":"link"}