Holey Galahad SEE THROUGH Sanding/Grinding Disc - Round Coarse Blue 90 Grit by King Arthur's Tools. Round Coarse Blue 90 Grit Disc for rapid removal with smooth, coarse finish on contoured or concave surfaces. Holey Galahad is engineered to "open a window to your work" - no stopping to lift the grinder and check your progress. See Where You've Been & Where You're Going! HOLEY GALAHAD® is a new generation of patented carbide discs with “see through” technology – enabling you to see the workpiece surface behind the disc while you’re working. This feature dramatically improves production by up to 15% and saves using literally hundreds of flap disc sanders. You’ll notice an immediate difference, Holey Galahad® quickly allows you to shape peaks and valleys into smooth surfaces as you see them, eliminating the need to “feel” the high and low spots. You can see what you’re doing and where you’re going as you work as opposed to the standard procedure of carve, lift, check; carve, lift, check, and repeat. Technical Specs: Discs can be used on both their face and edge surfaces. Made of durable Tungsten Carbide, no heat build up. Fits most 4-1/2" (115mm) and European 125mm angle grinders with King Arthur's Recessed Universal Nut (See below). Maximum 14,000 RPM. Discs are 4" (100mm) in diameter and feature patented structured tungsten carbide teeth bonded to steel discs over the total cutting surface. Tungsten carbide needles are manufactured in a 5-stage patented process. Made in USA. For important information about proper instillation and safety considerations, please download the pdf version of the Holy Galahad® Instruction Manual. Do You Have a Universal Hex Nut? Secure your King Arthur's grinder accessories with the Universal Hex Nut: KA-13750 for American Grinders with 5/8 inch shafts KA-14000 for European Grinders with 14mm shafts FEATURES: Nothing shapes wood better! From bowls to bears or artistic sculptures to log homes, furniture making, and taxidermy – anytime you need to get a final shape, whether flat or contoured, Holey Galahad® see through discs can help bring your vision to reality. Holey Galahad® features patented carbide teeth that move effortlessly with or against the grain on all types of wood. These extremely sharp, long wearing conical teeth provide superior surface removal with a very smooth action, making Holey Galahad® easy to control. • Ability to "see through" to the surface being finished• Durable Tungsten Carbide • No Heat Build Up • Coarse, Medium and Fine Grit Discs• Round and Flat Profiles (Suited to contoured, concave and flat surfaces)• Discs can be used on both their face and edge surfaces• Excellent Value ( One disc saves costs in sandpaper, time, labor and effort) MODELS: Six (6) models are available in round or flat profiles in coarse, medium and fine carbide grits to suit contoured, concave and flat surfaces. KA-47851-RCB - Round Coarse Blue 90 Grit -Rapid removal with smooth, coarse finish.KA-47852-RMR - Round Medium Red 70 Grit -Rapid removal with medium to fine finish.KA-47853-RFG - Round Fine Green SSG390 -Doesn’t need much to finish sanding. KA-47871-FCB - Flat Coarse Blue 90 Grit -Rapid removal with smooth, coarse finish. KA-47872-FMR - Flat Medium Red 70 Grit -Rapid removal leaving medium to fine finish.KA-47873-FFG - Flat Fine Green SSG390 -Doesn’t need much to final finish sanding. Holey Galahad® discs are also quite effective on fiberglass, plastic, solid rubber, foam core, polyurethane, silicone, soapstone and composite materials used in taxidermy. Holey Galahad discs are also included in many of the money saving King Arthur's Tools Power Carving Kits!