DentFix 1600K The Extender with 8.0mm HSCo Spot Weld Bit- When access is limited or obstructed either by a structural member or other component, we have a solution. “The Extender” is a spot weld drill bit extension that adds 6½ inches of length, letting you get to those deep and hard to reach spot welds. The plastic sleeve protects any nearby structures from damage & cables from getting tangled. You can stabilize the drill point by holding here.Works with any 3/8” drill. Recommended not to exceed 1800 rpm. Includes our DF-1480 8 mm HSCo drill bit.