description 12 ft magnesium screed bar extra rigid, double triangular magnesium screed bar. minimizes variability in vibration. clamps to screedemon - no holes or hardware through bar. attached or removed from screed in seconds for cleaning or transport. allows for offsetting of screed for working under protrusions. california proposition 65 warning. features double triangular design lightweight magnesium material utilizes clamp system - no extra hardware extra rigid design for low vibration variation allows for offsetting of screed for working under protrusions attached or removed from screed in seconds specifications acme tools brand name mbw acme tools part number 17812 assembled weight (lbs) 24 california proposition 65 warning required yes country of origin united states globaltradeitemnumber (gtin) 00413644000907 manufacturer warranty replacement if inspected before delivery is taken package weight 25 package weight (lbs) 25 shipping weight (lbs) 28 upc 413644000907