description knucklehead pull bar the crain no. 560 knuckle head pull bar features a boxed knuckle hammering head that is welded to the body. the width has been increased to reduce body bending, and the length is increased for more working room at the wall. california proposition 65 warning. specifications acme tools brand name crain acme tools part number 560h1 assembled weight (lbs) 5.0 california proposition 65 warning required yes globaltradeitemnumber (gtin) 00734995560002 package weight 6 package weight (lbs) 6 upc 734995560002