{"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\u003eThe \u003cstrong\u003eGRS Maestro EX Handpiece (004-905)\u003c\/strong\u003e is a slim, balanced, and exceptionally smooth pneumatic engraving handpiece designed for professional jewelers, stone setters, and metal engravers. Sharing the same overall length as the original Maestro, the EX features a diameter only 20% larger — yet its piston is over 3.5 times heavier with a longer stroke, delivering significantly more power across a wide range of applications, including stone setting, general metal engraving, texturing, and hammering.\u003c\/p\u003e\n\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, enabling fast, two-second tool changes. This set includes six Quick Change holders, providing immediate versatility right out of the box.\u003c\/p\u003e\n\u003cp\u003eCompared to the Maestro MX, the Maestro EX is lighter at 3.52 oz. versus 4.96 oz. for the MX, and features a smaller maximum diameter of 18 mm versus 22 mm for the MX. The Maestro EX delivers power comparable to the GRS Magnum handpiece, while the MX exceeds even that level. For professionals seeking a powerful yet lightweight and compact handpiece, the Maestro EX is an ideal choice.\u003c\/p\u003e\n\u003cp\u003eHand control can be enhanced by adding an optional Airtact Thumb\/Finger element (sold separately). The Maestro EX is constructed from \u003cstrong\u003eheat-treated stainless steel and solid brass\u003c\/strong\u003e for durability and long-term professional use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e This handpiece is \u003cem\u003enot\u003c\/em\u003e Airtact ready and is \u003cem\u003enot\u003c\/em\u003e compatible with the GraverMeister machine.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\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\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\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003e004-905\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e3.52 oz. (100 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOverall Length\u003c\/th\u003e\n\u003ctd\u003e4 in. (102 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Diameter\u003c\/th\u003e\n\u003ctd\u003e18 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTool Holding System\u003c\/th\u003e\n\u003ctd\u003eGRS QC (Quick Change)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction Materials\u003c\/th\u003e\n\u003ctd\u003eHeat-treated stainless steel and solid brass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAir Supply\u003c\/th\u003e\n\u003ctd\u003eOil-free compressed air (via compatible GRS system)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAirtact Ready\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGRS Maestro EX Handpiece (004-905)\u003c\/li\u003e\n\u003cli\u003e6 GRS Quick Change holders\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eCompatible with the following GRS engraving systems using oil-free compressed air:\u003c\/p\u003e\n\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\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\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\/products\/grs-004-905-maestro-ex-handpiece-6-quick-change-holders","provider":"Otto Frei","version":"1.0","type":"link"}