Astro Pneumatic Tool 205QL ONYX Quick-Lock 90Degree Angle Die Grinder, 1/4" Unique Quick-Lock design locks the spindle in place with a push of a button Requires only 1 wrench instead of 2 during attachment changes Maximum noise suppression, only 78dB; Rear exhaust Composite handle eliminates vibration, cold temperatures and provides a firm grip; Built-in regulator Lever throttle for feathering control; Compact and lightweight