Magnetic-Base Indicator Holder Arm Type Flexible Base Height 2 13/64 in Base Length 2 23/64 in Base Size 2.362 in L x 1.969 in W x 2 1/5 in H Base Type Magnetic Base Width 1 31/32 in Compatible Indicator Mounts 3/8 in Holding Power 176 lbf Maximum Reach 12.992 in Step Type V Step Working Length of Post/Lower Arm 12.992 in Construction Steel Includes Snug Yes Magnet Type On/Off Knob Screw Type Plastic Knob