30Pcs 1.2mm Diamond Core Drill Bit Jade Drilling Shank Diameter 3/32

Features: Gem diamond drill bits diamond drill bits for stone jewelry The shank diameter is 3/32 inches Compatible with most die grinders and rotating tools with 3/32 inch chuck Use with water as a lubricant Drilling speed: drilling per second Parameter: Name: jade punching needle Head diameter: 1.2mm Drilling depth: 15mm depth Toolholder diameter: 2.35 mm (3/32 inch) Total length: 45 mm Quantity: 30 pieces Package Included: 30pcs jade punching needle Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.