Jacobs Heavy Duty Keyed Chuck 34 Series 1/2in (13mm) Chuck 14440 PB Analog Continuity Tester Surface Drive Design provides improved

Surface Drive Design provides improved box end strength

All wood surfaces are waterproof  treated

Works with up to six transmitters: doorbell push buttons

Soft-to-the-touch eva handle provides comfort

Jacobs Heavy Duty Keyed Chuck 34 Series 1/2in (13mm) Chuck 14440 PB Analog Continuity Tester Surface Drive Design provides improvedJacobs 14440 PB Heavy Duty Keyed Chuck 34 Series 1 2in (13mm) Chuck Jacobs Traditional Plain Bearing Design for Heavy Duty Industrial Drilling and Lathe Work. 1 2in (13mm) Capacity, JACOBS K3 Key (Key Not Included) Features Heavy Duty Design. Jacobs fluted sleeve design. Jaws Center Grind for Straightness and Alignment. Through hardened sleeve teeth, plus hardened nose and keyholes provide outstanding wear resistance. Each chuck 100% inspected for