description m12 true rms clamp-gun cordless clamp meter kit for hvac the clamp-gun? m12? cordless lithium-ion clamp meter for hvac/r is a heavy duty true-rms current tester for professional commercial and industrial hvac/r applications. powered by the milwaukee m12? redlithium? battery, the 2238-21 features an ergonomic pistol grip design which greatly increases comfort and ease-of-use in overhead applications. the unit also provides a wide 1.30 in. jaw opening to easily handle large conductors, a thin jaw profile for access to tight spaces, a large white on black display, embedded non-contact voltage detection and an embedded extra bright led floodlight. the 2238-21 is covered by the milwaukee 5-year warranty. california proposition 65 warning. specifications acme tools brand name milwaukee acme tools part number 2238-21 assembled weight (lbs) 5.0 california proposition 65 warning required yes globaltradeitemnumber (gtin) 00045242173839 package weight 6 package weight (lbs) 6 upc 045242173839