description planetary floor preparation system the 8274-4 is the only grinder on the market offering 3 hp at 115 volts while operating at a 230-volt level. with variable speed and a soft start to control its amperage draw, the 8274-4 adjusts to the needs of small or large jobs. the versatility of the 8274-4 is derived from its quick-change magnetic tooling to remove thin-set, coatings, adhesives, and high spots, prepare concrete and overlays for coatings, and sand and refinish wood flooring. polishes floors to a high-gloss shine. california proposition 65 warning. features three-part adjustable angle handle choose from 15a or 20a circuit-breaker settings with a convenient switch on the side of the controller; the 15a selection limits motor draw to 15 amps; the 20a selection pulls up to 20 amps forward and reverse directional controls increase tooling productivity with cleaner consumables and more even wear variable speed control dual rear vacuum ports flip-style weights for added or decreased head pressure removable handle and weights for easy transport 18-inch grinding path; uses national’s patented self-tensioning, single-belt design to prepare concrete surfaces to a 3000-resin shine adjustable velcro dust guard lets the machine operate within an eighth of an inch of walls and promotes nearly dustless operation modular design allows you to pull the machine into three different parts for transportation specifications acme tools brand name national flooring equipment acme tools part number 8274-4 adjustable handle height yes assembled depth (in) 75 assembled height (in) 52 assembled weight (lbs) 388 assembled width (in) 20 blade width (in) 0 california proposition 65 warning required yes country of origin united states globaltradeitemnumber (gtin) 00400274000117 height (in) 52 hertz (hz) 60 horsepower (hp) 3 housing material metal maximum handle height (in) 52 package contents planetary floor preparation system package depth 38.5 package height 27.5 package weight 389 package weight (lbs) 389 power source 115v self propelled no size 75" x 20" x 52" upc 400274000117 voltage 115 voltage (v) 115