Heavy duty 5" long neck right angle air die grinder with 1/4" and 1/8" collets operates at 20000 rpm speed.It comes with exchange 1/8" collet adapterOptional Muffler MSA-005 for noise reduction to be purchased separately. Right angle head designed air die grinder is used for easy operation To reach hard and deep area with the angular surfaces. Long neck extensive shaft design extends this die grinder tool to hard to reach area. Rear Exhaust You may connect muffler hose for noise reduction...