MAGNETIC BACK FOR DIAL INDICATOR **NEW**FREE SHIPPING** Magnetic Base With Fine Adjustment For Dial Indicator Fixed arm height:7";Fixed arm diameter:0.464";Extension arm length:6";Extension arm diameter:0.385" Magnetic Base dimension: 2-1/2'' L x 2''W;Holds 3/8" stem and lug back Holding Power: 135lbs ; Case INCLUDED;Case overall dimension: 1-1/2''L x 3-3/4''W x 1/2''H Quantity: 1;Shipping Weight: 3 LBS