3/8" x 4" Simpson SDS Plus Concrete Masonry Drill Bit-Marshfasteners.com
3/8" x 12" Spline Bit, Each
924288-8 Westward, Straight Spline Drive Rotary, 3/8 in Drill Bit Size, 6 in Overall Length, 4-1/2 in Max Drilling Depth, Carbide Tipped | Imperial Supplies
Amazon.com: 3 Pcs 1/4" 3/8" 1/2" Socket Driver Adapter Drill Bit Adapter Extra Long Adapter Impact Drill Bits for SDS Plus Hammer Drill : Tools & Home Improvement
VEVOR Auger Drill Bits for Planting Set of 4, Garden Auger Drill Bit, Spiral Drill Bit for Post Hole Digger, Bulbs Planting & Holes Digging, for 3 /8" Hex Drive Drill | VEVOR US