Attempting to drill through two small rocks, 1/4" and 3/8" thick, it took 10 bits to to make a dent at all. On the 11th bit I found one where the coating did not come off immediately and drilled two holes by itself. And yes, I did this in a small tub of water, keeping the bit cold and moving at a moderately slow speed. It worked in the end, but going through 10 bits before you find one that actually works is very frustrating. There are 60 of these in the set, I believe only 3 to 6 of these will be viable. So base your purchasing decision on that.
Energup 3.0Ah 40V MAX Replacement Battery For Black+Decker 40V LBX2040, LBXR36, LBXR2036, LST540 & More
40 Review
2Pack 6000MAh Li-Ion Replacement Battery For Dewalt 18V XRP Ni-Cad DC9096 DW9098 DE9503
42 Review
Linkstyle Universal Socket Wrench Set, 7Mm-19Mm Multi-Function Repair Kit With Drill Adapter Ratchet Gadget, Grip Hand Tools Gifts For Men Dad Husband Boyfriend DIY Handyman (4PCS)
44 Review
Set Of 2 VARSK Contour Gauges With Light (5" And 10"), Wide Shape Duplicator Profile Tool For Accurate Measuring Of Corners, Woodworking Templates, Tiles, And Laminate
45 Review
Fiskars X25 Splitting Axe: 28-Inch Length for Superior Splitting Power
20 Review
140Mm/150 Grit Diamond Needle File Set - 10 Piece HTS 101E0
30 Review
FANSTINOW Folding Knife: Compact, Durable & Easy To Carry!
30 Review
Get The Job Done With DURATECH Flex-Head Ratcheting Wrench Set - 12-Piece Metric Set With Rolling Pouch
28 Review