Diamond Core Drill Bit This professional diamond core bit is high-frequency welded, providing a rapid and clean drill. M22, 1 1/4UNC, 1/2Gas universal thread is suitable for multiple drill rigs, apply to concrete and brick. * Efficient & Smooth Cutting * Engineered For Exact Fitting * Humanized Structure * Simple Operation Diameter (a) b-c Diameter (a) b-c Diameter (mm) inch Overall Length-Effective Length Diameter (mm) inch Overall Length-Effective Length Φ18 5/7" 370-330mm 450-410mm Φ108 4-1/4" 370-330mm 450-410mm Φ20 4/5" Φ114 4-31/64" Φ22 7/8" Φ116 4-35/64" Φ25 1" Φ120 4-5/7" Φ27 1.06" Φ127 5" Φ30 1-3/16" Φ132 5-1/5" Φ32 1-1/4" Φ140 5-33/64" Φ36 1-2/5" Φ152 6" Φ38 1-1/2" Φ159 6-3/8" Φ40 1-3/5" Φ162 6-25/64" Φ44 1-7/10" Φ168 6-3/5" Φ46 1-4/5" Φ180 7" Φ51 2" Φ188 7-25/64" Φ56 2-1/5" Φ200 8" Φ63 1-1/2" Φ220 8-7/10" Φ66 2-3/5" Φ230 9-1/16" Φ71 2-4/5" Φ245 9-3/5" Φ83 3-1/4" Φ254 10" Φ86 3-1/4" Φ270 10-5/8" Φ89 3-1/2" Φ300 12" Φ96 3-25/32" Φ325 12-51/64" Φ102 4" Φ350 14" Usage Scenarios Line Of Production Company Profile Certifications FAQ Q1: Is OEM available? A: Yes, OEM and customization are accepted. Besides, we can provide label printing service. Q2: Are samples available? A: Yes, we can send our samples first for testing after confirming the price once you need, but the freight fee needs to be payed. Q3: What is your payment terms? A: L/C, D/P, D/A, T/T, Western Union for different circumstances. Q4: What is your delivery time? A: Usual delivery time is 5-10 days after receiving the advance payment, while it takes longer time for the customized product. Q5: Does Senmine provide technical support? A: Yes! Senmine has team members with extensive amounts of experience in diamond tools waiting to answer the toughest question.