Heat treated steel "circlip" pliers for large equipment repair. Replaceable tips and spring ratchet locking mechanism to securely hold against snap ring tension. Internal plier's capacity 3-1/16" to 6-1/4" (78mm to 159mm) snap rings. External plier's capacity: 3-1/2" to 6-1/2" (89mm to 165mm) snap tings. Blow molded storage case Kit includes extra sets of replaceable 0.12" (3mm) diameter tips: straight, 45 degrees and 90 degrees.