*BIGSBY® B7 TREMOLO FOR LEFT HAND GOLD - For Left Hand Guitar - Model Name: B7 - Series: Original Kalamazoo Line - Manufacturing Method: Cast - Manufacturing Material: Aluminum - Approximate weight: 354 grams/12.5 oz. - Overall Length: 8 3/4”/222.3 mm - Overall Width: 3 5/8”/92.1 mm - Arm adjusts with 1/8” Allen wrench and 5/16” socket wrench