It can be tightly kept without loosening, and its longevity and durability makes it more practical. Its main advantages are waterproof, anti-rust, anti-corrosion, multi-layer coating, long service life. Industrial grade steel has high hardness and wear resistance. Thicken steel non-slip fine-tooth screw bids farewell to slippage. There are 7 size for you to choose. It is ideal for woodwork & metal clamping applications and DIY. Item Name: G-Clamp Material: Steel Application: Water Pump, Pipe, Rivet, Clamp Platform Hardness: 56HRC Size Details: 1 inch Size: 11cm x 4.7cm x 1.4cm/4.33" x 1.85" x 0.55", Max Opening: 2.5cm/0.98", Throat Depth: 1.7cm/0.7", Screw Diameter: 0.7cm/0.28" (Approx.) 2 inch Size: 15.6cm x 5cm x 1.5cm/6.14" x 1.97" x 0.59", Max Opening: 4.9cm/1.93", Throat Depth: 1.9cm/0.7", Screw Diameter: 0.9cm/0.35" (Approx.) 3 inch Size: 24.5cm x 9cm x 2cm/9.65" x 3.54" x 0.79", Max Opening: 8.2cm/3.23", Throat Depth: 4.1cm/1.6", Screw Diameter: 1.1cm/0.43" (Approx.) 4 inch Size: 30.5cm x 10cm x 2.5cm/12.01" x 3.94" x 0.98", Max Opening: 10cm/3.94", Throat Depth: 4.4cm/1.7", Screw Diameter: 1.5cm/0.59" (Approx.) 5 inch Size: 37cm x 11.5cm x 2.6cm/14.57" x 4.53" x 1.02", Max Opening: 13.4cm/5.28", Throat Depth: 5.5cm/2.2", Screw Diameter: 1.5cm/0.59" (Approx.) 6 inch Size: 43cm x 12.5cm x 2.6cm/16.93" x 4.92" x 1.02", Max Opening: 15.7cm/6.18", Throat Depth: 5.7cm/2.24", Screw Diameter: 1.5cm/0.59" (Approx.) 8 inch Size: 54cm x 14cm x 2.8cm/21.26" x 5.51" x 1.1", Max Opening: 20.5cm/8.07", Throat Depth: 7cm/2.8", Screw Diameter: 1.5cm/0.59" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x G Clamp