Installing delicate screws into hard wood requires great care and accuracy. Schaller Slotted Classical Guitar Machines - High Quality 16:1 Hauser-style Tuners For Nylon-string Classic Guitars The roller sleeves are durable 3/8 (9.53mm) diameter white plastic. We highly recommend the #1712 Depth-stop Drill Bit (5/64 bit) for the pilot hole before installing these screws. Gotoh Tuners 3x3 Schaller GrandTune Lyra Tuning Machines - Ruthenium / Snakewood /Black Guitar Clavijas Installation Tips - Peghole Spacing: Plate-mounted Tuners Can't Work Efficiently If The Pegholes Are Improperly Aligned. Schaller Slotted Classical Guitar Machines - High Quality 16:1 Hauser-style Tuners For Nylon-string Classic Guitars · The Roller Sleeves Are Durable 3/8" (9.53mm... The knobs are handsome pearlescent plastic or genuine polished ebony. Lubricate the screw threads with cutting lubricant (also wax or a bar of soap) to reduce friction and help them thread properly. Our Tuning Machine Drill Jig For Slotted Pegheads Ensures The Correct 1-3/8 String Roller Spacing For Accurate Tuning. Alessi Tuning Machines - Price Drop - Savage Classical Guitar Mounting screws: Pilot holes required. RT-TCZ for Wrangler Hood Latch Lock Catch, Aluminum Hood Latches for Jeep Wrangler JK JKU 2007-2017 JL JLU 2018-2025 Gladiator JT 2020-2025 Black Exterior Accessories 2pcs SEMTION Hood Latches Hood Locks Catch Kit for Jeep Wrangler JL JLU JT Gladiator 2018-2024 Installation TipsPeghole spacing: Plate-mounted tuners can't work efficiently if the pegholes are improperly aligned. Each set includes a pair of 3-left/3-right tuning machines with mounting screws.