Comparison : Item # 693010, Screws, Tapping - Thread Cutting, Forming and Rolling
Item # 693015, Screws, Tapping - Thread Cutting, Forming and Rolling
Item # 693020, Screws, Tapping - Thread Cutting, Forming and Rolling
Item # 693021, Screws, Tapping - Thread Cutting, Forming and Rolling
Item # 693025, Screws, Tapping - Thread Cutting, Forming and Rolling