1pcs 18-68MM Diamond Drill Bits Set Ceramic Tile Hole Saw with position drill for Glass Marble Granite Stone Porcelain

ZNXIMER Diamond Hole Saw Bits: 18mm, 20mm, 22mm, 25mm, 30mm, 32mm, 35mm, 38mm, 40mm, 45mm, 50mm, 55mm, 65mm, 68mm

Diamond Tile Hole Saw Guided Drill Bits: (Non-Slip Start for Accurate Positioning) The diamond pilot hole saw drill bit features center-guided drilling to hold the drill point in place, preventing slippage on glossy tiles, curved surfaces, glass bottles, or ceramics.

Universal Compatibility with Tough Materials： Effortlessly drill holes in tile, ceramic, granite, marble, glass bottles, porcelain, and granite countertops. Ideal for tile tools.

Precise Positioning : Diamond Hole Saw Guide Bits (for ultra-accurate pilot holes), Easily achieve precise, crack-free, smooth-edged holes in hard stone surfaces. Saves time, reduces tool wear, and delivers fast, cool, chip-free holes—perfect for professional contractors and DIY projects.

Instructions for Use: Start with the pilot bit for exact positioning, then remove the pilot bit, and use the main diamond hole saw in a wobbling motion to facilitate debris removal and achieve perfect holes with minimal force.