They work if you don't touch the material you're drilling (which is probably a good idea anyway), otherwise they'll move along the drill bit. I wasn't able to tighten them enough to stay in place.
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
Ni-Mh 19.2V 3.6Ah Replacement Battery For Craftsman Diehard C3 130279005, 130279003, 315.113753, 315.115410, 315.11485 1323903 1323517 11375 11376 Cordless Power Tools
42 Review
Energup Li-Ion Replacement Battery Pack For Black Decker Versapak VP Series With 2-Port Charger
43 Review
Circular saw Makita 5008MG, 1800 W blue/silver
68 Review
Get The Job Done With DURATECH Flex-Head Ratcheting Wrench Set - 12-Piece Metric Set With Rolling Pouch
28 Review
JAKEMY 69 In 1 Precision Ratchet Screwdriver Set For Household Repairs And Maintenance - Magnetic, Rotatable, And Disassemble Tool Kit For Furniture, Cars, Computers, And Electronics
29 Review
140Mm/150 Grit Diamond Needle File Set - 10 Piece HTS 101E0
30 Review
FANSTINOW Folding Knife: Compact, Durable & Easy To Carry!
30 Review