38/30 Super Grade 3/4″ Diameter Sharp Carbide Rock Drilling Tooth – 4140 Alloy Through Hardened Body Provides Superior Drilling Performance And Increased Abrasion Resistance Against Steel Wash. This Design Utilizes A Unique – Safe – Push On Clip That Holds The Cutter Bit Securely Yet Provides Fast – Safe Changeability. Eliminates The Dreaded Snap Rings And Pliers. Fast Change Outs Reduce Down Time.