Keson ProChalk Permanent Chalk 169973 The adapter features an optimized

The adapter features an optimized Shockzone™ that absorbs peak torque and prevents the adapter from breaking

It features VisiMax™ technology

Lock-on mode delivers continuous power to secure drywall panels

One-Handed Control

A brass locking pin maintains the blade position to cut with confidence

Keson ProChalk Permanent Chalk 169973 The adapter features an optimizedProChalk Permanent chalk for weatherproof and waterproof lines that arent going to go away any time soon. Most users are choosing this level of intensity for applications that are going to be covered. This level is engineered for more extreme conditions. Exterior applications include exterior layout, extreme conditions, concrete layout, long term applications.