{"product_id":"grs-004-905-maestro-ex-handpiece-6-quick-change-holders","title":"GRS 004-905 Maestro EX Handpiece with 6 Quick Change Holders","description":"\u003cp\u003eSet stones, engrave metal, texture, and hammer from a single pneumatic handpiece at the bench. The \u003cstrong\u003eGRS Maestro EX Handpiece (004-905)\u003c\/strong\u003e from Glendo GRS is slim, balanced, and exceptionally smooth, built for professional jewelers, stone setters, and metal engravers. It shares the same overall length as the original Maestro with a diameter only 20% larger, yet its piston is over 3.5 times heavier with a longer stroke, delivering significantly more power across stone setting, general metal engraving, texturing, and hammering.\u003c\/p\u003e\u003cp\u003eControl remains excellent throughout the full Maestro EX power range. The handpiece uses the \u003cstrong\u003eGRS QC (Quick Change) Tool Holding system\u003c\/strong\u003e for two-second tool changes, and this set includes six Quick Change holders, so it is versatile straight out of the box.\u003c\/p\u003e\u003cp\u003eCompared to the Maestro MX, the Maestro EX is lighter at 3.52 oz. versus 4.96 oz. for the MX, and its maximum diameter is 18 mm versus 22 mm. The Maestro EX delivers power comparable to the GRS Magnum handpiece, while the MX exceeds even that level, so engravers who want real power in a lightweight, compact body will find the EX an ideal choice.\u003c\/p\u003e\u003cp\u003eThe Maestro EX is constructed from \u003cstrong\u003eheat-treated stainless steel and solid brass\u003c\/strong\u003e for durability and long-term professional use, and it runs on oil-free compressed air from a compatible GRS engraving system. Hand control can be enhanced by adding an optional Airtact Thumb\/Finger element, sold separately.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePiston over 3.5 times heavier than the original Maestro with a longer stroke for greater power\u003c\/li\u003e\n\u003cli\u003eSame overall length as the original Maestro; only 20% larger in diameter\u003c\/li\u003e\n\u003cli\u003eExcellent control across the full power range\u003c\/li\u003e\n\u003cli\u003eCompatible with the GRS QC Tool Holding system for two-second tool changes\u003c\/li\u003e\n\u003cli\u003eIncludes six Quick Change holders\u003c\/li\u003e\n\u003cli\u003eLighter and more compact than the Maestro MX at 3.52 oz. and 18 mm maximum diameter\u003c\/li\u003e\n\u003cli\u003ePower comparable to the GRS Magnum handpiece\u003c\/li\u003e\n\u003cli\u003eOptional Airtact Thumb\/Finger element can be added for enhanced hand control\u003c\/li\u003e\n\u003cli\u003eConstructed from heat-treated stainless steel and solid brass\u003c\/li\u003e\n\u003cli\u003eRequires oil-free compressed air via a compatible GRS engraving system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eCompatible with the following GRS engraving systems using oil-free compressed air:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGraverMach AT\u003c\/li\u003e\n\u003cli\u003eGraverMax G8\u003c\/li\u003e\n\u003cli\u003eGraverMach\u003c\/li\u003e\n\u003cli\u003eGraverMax SC\u003c\/li\u003e\n\u003cli\u003eGraverSmith\u003c\/li\u003e\n\u003cli\u003eClassic GraverMax \/ GraverMate\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eThis handpiece is \u003cstrong\u003enot\u003c\/strong\u003e Airtact ready.\u003c\/li\u003e\n\u003cli\u003eThis handpiece is \u003cstrong\u003enot\u003c\/strong\u003e compatible with the GraverMeister machine.\u003c\/li\u003e\n\u003cli\u003eOptional Airtact Thumb\/Finger element available separately for enhanced hand control.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Glendo GRS","offers":[{"title":"Default Title","offer_id":43579862614230,"sku":"104.905","price":470.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/grs-004-905-maestro-ex-handpiece-with-6-quick-change-holders-otto-frei.jpg?v=1719958406","url":"https:\/\/www.ottofrei.com\/ja\/products\/grs-004-905-maestro-ex-handpiece-6-quick-change-holders","provider":"Otto Frei","version":"1.0","type":"link"}