"ADJUSTABLE SANDING ARM PIVOTS 100 DEGREE FOR HARD TO REACH AREAS;EASILY ADJUSTABLE BELT TRACKING WITH A TURN OF A KNOB;COMPACT AND LIGHTWEIGHT (3.3 LBS);3 DIFFERENT SIZE ARM ASSEMBLIES AND BELTS AVAILABLE (1/4 IN, 3/8 IN, 1/2 IN) FOR INCREASED VERSATILITY;INCLUDES:3/8 X 21 IN. VARIABLE SPEED BELT SANDER, (2) ABRASIVE BELTS NO.80 (A-34469), 3/8 ARM ASSEMBLY (125158-5), OPERATING MANUAL"