Hex Pocket Hole 3/8" Step Drill Bit+Stop Collar Set Guide Feature: 100% brand new and high quality 1/4" Hex-Shank drill bit Works with standard chucks of 9.5mm(3/8")dia. Small tip includes clearance hole for screw shank Large diameter creates flat-bottomed hole Recommended for use with corded high-rpm drills Perfect for use with pocket hole guides 3/8"(9.5mm) diameter bits step down to about 3/32" Come with wrench and limit ring Specifications: Material: HSS4241 Titanium Fit 1/4"(6.3mm) adapter Diameter: 9.5mm(3/8") Total Length: Approx. 157mm/6.18" Quantity: 1 set (as picture shown) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Drill Bit 1 x Limit Ring 1 x Wrench 10 pcs mini size cobalt drill bit set for micro hole drilling into various material, it contains 2 pcs of each 1mm(3/64"), 1.5mm(1/16"), 2mm(5/64"), 2.5mm(3/32"), 3mm(1/8") diameter drill bit Very tough drill bit for heavy duty work drilling into stainless steel, light-gauge metal, high-carbon steel, aluminum and ally steel, cast iron, abrasive alloy metal, other hard metal and hardened steel. 4 times life time than normal metal drill bit when drilling into PCB board, plastic, wood, jewelry, sheet metal and normal steel M35 Cobalt drill bits are made from industrial grade High Speed Steel with 5% cobalt alloy that is heat and abrasion-resistant 135-degree split-point tip starts drilling immediately with less force and eliminates walking or skating across the work surface Straight shank fits with electric and cordless power drill and rotary drill. Drill bits are packed in a Plastic Bag