Maxdrill High Performance Hot Sale Rock Tools T38 64mm 12 Tips Drop Center Retrac Skirt Thread Button Bit   Product Description Dimensions D Flushing hole(mm) Buttons(mm) Angle part no. mm in Front No Size Gauge No Size Front No Size Gauge No Size 64 2 1/2 2*9 2*6 4*10 8*10 30 ° 3064T3812R 70 2 3/4 2*8 2*6 4*11 8*11 35 ° 3070T3812R 76 3 2*9 2*7 4*12 8*12 35 ° 3076T3812R 89 3 1/2 2*11 2*8 6*12 8*13 35 ° 3089T38F14R 64 2 1/2 3*7 1*6 4*10 8*10 35 ° 3064T3810DR  Remarks: Hemispherical-66(Usually for very hard rocks) Ballistic-65(Ususally for medium hard rocks) Semiballistic-64(Usually for medium hard rocks) Conical-67(Usually for soft rocks) Process &Packaging FAQ The information you may like to know before order: 1. Methods of Payment:   T/T (Telegraphic Transfer) or Western Union or L/C at sight 2. Handling time for an order   Based on order quantity, normally it takes 25 days for production.   Only 2  or 3  days if we have stock on your request size. 3. Shipping way   Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air   Bulk order: we suggest by air or by sea. 4. Quality Control   We have our own experienced QC.   There will be strict inspection and testing for every order before shipping out. 5. After Services:   a. Our sales team will response for your question within 24 hours (Holidays Excluded)   b. Technical Support will be available in any time   c. Free replacement will provide once the failure confirmed caused by our product quality